Good Flutter layered architecture: TBR Group expertise

In this post, you’ll learn more about Layering the Flutter Application Architecture.

Structuring code is crucial for building large-scale applications that are maintainable and extendable. Poorly structured code can make it difficult to add new features or make changes to existing functionality, leading to bugs and technical debt that can accumulate over time.

What is app architecture?

The architecture of an application determines how its components interact with each other, how data is stored and retrieved, and how the application responds to user input. A well-structured architecture should be modular, with clear separation of concerns between different parts of the codebase. This allows developers to work on different parts of the codebase independently, without fear of breaking other parts of the application. 

There are several popular architectural patterns that can be used to structure code, such as Model-View-Controller (MVC), Model-View-ViewModel (MVVM), and Clean Architecture. Each pattern has its own strengths and weaknesses, and the choice of pattern will depend on the specific needs of the application.

 Some common components of an application architecture include:

  • User interface (UI). The interface that users interact with to use the application.
  • Data storage. The technology used to store data, such as a database or file system.
  • Backend. The server-side components that handle business logic and data processing.
  • Networking. The protocols and technologies used to communicate between the frontend and backend of the application.
  • Security. The mechanisms used to protect the application from unauthorized access and attacks.

A few words about layers

Layers refer to different levels of abstraction or responsibility in a system. Each layer has a specific function and interacts with the layers above and below it to provide a cohesive and functional system.

The layers typically include:

  • Presentation Layer: This layer is responsible for presenting the data to the user in a way that is easy to understand and interact with. It includes user interface components such as screens, forms, and dialogs.
  • Business Layer: This layer contains the application logic and business rules that process and manipulate data. It handles data validation, workflows, and business logic rules that govern how data is processed.
  • Data Access Layer: This layer is responsible for accessing data from a database or other data storage mechanism. It includes data access components such as data mappers, repositories, and data contexts.
  • Infrastructure Layer: This layer contains the technical infrastructure components that support the application. It includes components such as logging, configuration, and security.

By separating an application into layers, each layer can be developed and tested independently, making the application more maintainable and scalable. It also allows for more flexibility in the development process, as changes can be made to one layer without affecting the others.

The layered architecture pattern is just one example of how layers can be used in software development. Other examples include the OSI model for networking and the protocol stack used in communications.

The Single Responsibility Principle

The Single Responsibility Principle (SRP) is a software development principle when each class or module should have only one responsibility or job to perform.

The SRP is one of the SOLID principles;it helps to ensure that code is easy to understand, modify, and test.

When a class or module has only one responsibility, it is easier to understand its purpose and to modify it without affecting other parts of the codebase. This also helps to reduce the likelihood of introducing bugs or errors when making changes.

For example, a class that handles user authentication should not also be responsible for managing user profiles. Instead, these responsibilities should be separated into two separate classes, each with its own responsibility. 
Here are some examples of responsibilities that software components may have:

  • User interface (UI) components are responsible for displaying information to the user and capturing user input.
  • Business logic components are responsible for implementing the business rules and processes that govern the behavior of an application.
  • Data access components are responsible for accessing and manipulating data in a database or other data storage mechanism.
  • Networking components are responsible for managing communication between different parts of an application or between different applications.
  • Security components are responsible for ensuring that an application is secure and protected from unauthorized access or attacks.

Architectural patterns

Some common architectural choices include:

  • Monolithic architecture involves building a single, self-contained application that handles all aspects of the system’s functionality. This can be easier to develop and deploy, but may become unwieldy as the system grows larger and more complex.
  • Microservices architecture implies breaking the system down into small, independent services that communicate with each other over a network. This can make the system more scalable and easier to maintain, but may introduce additional complexity in terms of service discovery, communication protocols, and deployment.
  • Event-driven architecture is about building the system around a set of events or triggers, such as user input or external messages. This can make the system more responsive and adaptable to changing conditions, but may require additional overhead in terms of event management and processing.
  • Service-oriented architecture (SOA) is for building the system around a set of loosely-coupled, reusable services that can be easily combined and composed to create more complex functionality. This can make the system more flexible and adaptable, but may require additional effort in terms of service design and coordination.

When making architectural choices, consider a variety of factors, including the requirements of the system, the available technology stack, the skills and experience of the development team, and the expected future growth and evolution of the system. 

Define your layers

You can create different layers in your application to perform the three main duties. Layers need to be defined carefully so that they guarantee convenient operation and without compromising work.

Good architecture: what is it?

At TBR Group, we follow an architecture pattern that has four layers.

  1. Data Layer. This layer is responsible for interacting with the API.
  2. Domain Layer. This is the one responsible for transforming the data coming from the data layer.
  3. Business logic layer manages the state (usually using flutter_bloc).
  4. Finally, the presentation layer. It renders UI components based on the state.

Each layer contains multiple neurons, or nodes, which perform mathematical operations on the input data and pass the output to the next layer. The first layer, the input layer, receives the raw input data and passes it to the first hidden layer. The output layer produces the final output of the network, which could be a prediction or classification based on the input.

The layer responsible for domain-specific data modeling is known as the domain layer, which transforms unprocessed data into models specific to the domain that are then used by the business logic layer. The business logic layer maintains an unalterable state of the domain models supplied by the repository. Furthermore, this layer responds to user inputs from the UI and interacts with the repository when modifications are required based on the current state.

Say NO to mixed responsibilities

Very often, mixed responsibilities cause chaos in various projects. Without a clear division of duties and priorities, it is very easy to get confused and make a lot of mistakes that are then difficult to find and correct. 

import 'package:firebase_auth/firebase_auth.dart';

class StartPage extends StatelessWidget {
  Widget build(BuildContext context) {
    return StreamBuilder<User?>(
      stream: FirebaseAuth.instance.userChanges(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          return const ProfilePage();

        return const SignInPage();

Be consistent (always)

When working according to a specific template for projects, we advise you not to use labels with layers. Each layer should have a chain of relationships that will prevent interaction between layers that are not directly related. For example, the presentation layer should not call or interact in any way directly with the data-tier APIs.
Establish a consistent naming convention and adhere to it throughout the development process.  In the case of a project with a data layer that is a dependency of the domain layer, it would be beneficial to name the data layer accordingly, such as “data” or “repository”.  

├── lib
| ├── posts
│ │ ├── bloc
│ │ │ └── post_bloc.dart
| | | └── post_event.dart
| | | └── post_state.dart
| | └── models
| | | └── models.dart
| | | └── post.dart
│ │ └── view
│ │ | ├── posts_page.dart
│ │ | └── posts_list.dart
| | | └── view.dart
| | └── widgets
| | | └── bottom_loader.dart
| | | └── post_list_item.dart
| | | └── widgets.dart
│ │ ├── posts.dart
│ ├── app.dart
│ ├── simple_bloc_observer.dart
│ └── main.dart
├── pubspec.lock
├── pubspec.yaml

Reusability in mind

The abstract declaration and concrete implementation approach used in the flutter_todos example from the bloc library is a good way to implement this type of solution. The abstract declaration provides a blueprint for the functionality needed, while the concrete implementation provides the specific details for how it is implemented. This allows for flexibility in adapting the functionality to different use cases while maintaining a consistent API interface.

Balance abstraction

Choosing between creating a repository with a direct dependency or creating an API wrapper for an external package will depend on various factors, including the complexity of the external package’s API, the number of dependencies it requires, and how well it meets the specific needs of the project.

If the external package has a clean and simple API that meets the needs of the project without requiring too many dependencies or configuration, then creating a repository with the package as a direct dependency may be the best approach. This can simplify the codebase and make it easier to maintain, as well as potentially provide better performance.

The chat_location  application provides a good example of how to use this package with a repository, demonstrating how the package can be integrated into the app’s architecture while keeping the repository code clean and maintainable.

In cases where an external package’s API is more complex, creating an API package with a class that wraps that dependency can be a better approach. This can provide a more streamlined interface for the specific needs of the project and abstract away some of the implementation details.

The spacex_demo application is a good example of how to create a custom API package, providing a wrapper for the SpaceX API. This approach allows for a more tailored interface for the project’s specific needs, while also providing flexibility and isolation from any potential issues with the external API.

Don’t over-engineer

Over-abstracting can increase complexity and development time without providing any real benefit.

If the project primarily uses JSON as its data format, then abstracting the base properties of the model to accommodate other formats may not be necessary. In this case, it may be more efficient to simply create the serialization/deserialization functionality for JSON and avoid over-abstracting the model.

However, if there is a possibility of the data format changing in the future, or if there are other reasons for needing a more abstracted model, then it may be worthwhile to invest the time and effort into creating a more flexible model architecture.

Packages: yes or no?

The decision to use packages should be based on the specific needs and constraints of the project. For a small project with a small team, the added complexity of using packages may not be worth the benefits. In this case, it may be more efficient to handle migrations and updates manually.

However, as the project grows and the team expands, the benefits of using packages become more apparent. Component isolation becomes more important as the project becomes more complex, and having different team members working on different parts of the project simultaneously becomes more common.

You can have one teammate migrating the accounting repository to Very Good Analysis 2.4.0 and another migrating the retail API to dio 4.0.0 at the same time, so you can tackle fixing lints and null safety refactors without stepping on each other’s toes.

Choose right tools

When choosing packages or tools, it’s important to have a set of criteria to evaluate them against:

  • Activity on the GitHub repository: a package that is actively being developed and maintained is more likely to be reliable and up-to-date.
  •  metrics: provides useful information such as the number of downloads, the number of dependent packages, and the percentage of code coverage. This information can help you evaluate a package’s popularity and usefulness.
  • Test coverage: packages with high test coverage are more likely to be reliable and less prone to bugs.
  • Who’s maintaining it: knowing who is responsible for maintaining a package can give you an idea of its reliability and longevity.
  • Other factors that are important to you and your team: this could include factors such as documentation, community support, or compatibility with other tools or packages you’re already using.

Follow best practices

Studying other developers’ repositories is an excellent way to learn and improve. Many open-source projects have an active community of contributors who can help you with any questions or issues you may encounter. 


Refactoring is a natural part of the development process, and it’s important to recognize when something needs to be improved and not be afraid to make changes. Additionally, it’s important to maintain a positive attitude towards mistakes and failures, as they provide valuable learning experiences that can lead to growth and improvement. As the saying goes, “fail fast, fail often, fail forward.”

Welcome to our team!

If you are reading this article, then you are interested in the topic of structuring code. If you are ambitious, not afraid of difficulties, you have a lot of ideas, but a little lack of confidence and experience in your business – come to our team! 

Top meditation app features on the example of Mind Switch

The outbreak of the COVID-19 pandemic has added significant pressure to people’s lives for various reasons.

The pandemic has triggered feelings of fear, grief, and loneliness, as people have faced illness, loss of loved ones, and reduced social connections. As a result, startups and established companies got interested in developing meditation apps using the Flutter framework.

The growing demand, Flutter’s cross-platform capabilities, user-friendly interfaces, customization options, market potential, and technological advancements make it an attractive choice for companies aiming to enter or expand their presence in the meditation app market.

Best Meditation Apps of 2023

A meditation app is a mobile application designed to assist individuals in practicing meditation. These apps typically provide a variety of guided meditations, timers, and other features to support meditation practice. They are convenient tools that can be used anywhere and at any time, allowing users to integrate meditation into their daily routines.

Meditation apps often offer a range of meditation styles, such as mindfulness, breathing exercises, visualization, and body scans. They may also provide additional features like sleep aids, relaxation music, and programs tailored to specific needs, such as stress reduction or improving focus. Many meditation apps include progress tracking, reminders, and community features to help users stay motivated and engaged in their practice.

Brief stats of the meditation app market can help to understand more about clients and to develop a meditation app.

Source: FinancesOnline. 50 Essential Meditation Statistics for 2023: Benefits, Technology & Practice Data

Overall, meditation apps serve as accessible resources, some of them are free meditation apps, for individuals seeking guidance and support in establishing and maintaining a regular meditation practice, including apps for anxiety too. 

Source: FinancesOnline. 50 Essential Meditation Statistics for 2023: Benefits, Technology & Practice Data

Source: FinancesOnline. 50 Essential Meditation Statistics for 2023: Benefits, Technology & Practice Data

Top meditation app iOS and Android 

Headspace offers guided meditations for beginners and experienced practitioners. Includes various themed sessions for stress reduction, sleep improvement, and focus enhancement.

Calm provides guided meditations, sleep stories, breathing exercises, and relaxing music. Offers programs tailored to specific goals, such as managing anxiety or improving self-esteem.

Insight Timer offers a vast library of guided meditations from various teachers and traditions. Includes a timer for silent meditation practice and a community feature for connecting with fellow meditators.

Ten Percent Happier guided meditations designed for skeptics and busy individuals. Offers courses on mindfulness and personal growth, along with interviews and talks by experts in the field.

Simple Habit offers short, five-minute guided meditations for busy people. Provides sessions for specific situations like commuting, work breaks, or before sleep.

Smiling Mind designed for both adults and children, this app offers guided meditations and mindfulness exercises. Includes programs tailored to different age groups and life stages.

Buddhify provides guided meditations for different activities and moods, such as traveling, working, or difficulty sleeping. Offers a unique wheel interface for easy navigation.

Meditation apps are convenient and accessible tools that can assist individuals in developing and maintaining a regular meditation practice. They provide a wide range of guided meditations, timers, and other features to support various meditation techniques. With features of meditation app such as progress tracking, reminders, and community support, these apps can help individuals stay motivated and engaged in their meditation journey. Moreover, there are free anxiety apps for ios and free anxiety apps for Android.

Source: FinancesOnline. 50 Essential Meditation Statistics for 2023: Benefits, Technology & Practice Data

Top features of meditation apps for users

The tech aspect plays a crucial role in both the popularity and monetization of meditation apps like Headspace and Calm. Here’s how:

Accessibility and Convenience. The tech aspect allows meditation apps to be easily accessible and convenient for users. Mobile apps enable users to access guided meditations, mindfulness exercises, and other features anytime, anywhere, directly from their smartphones. 

Variety and customization. Meditation apps often have a wide range of meditation styles, durations, and themes, allowing users to customize their practice based on their preferences and needs. 

Motivation and accountability. Many apps offer progress tracking, reminders, and rewards, which help users stay motivated and committed to their meditation practice. 

Free meditation apps. Many meditation apps offer free access to basic features and a limited selection of guided meditations. This allows users to explore and experience meditation without financial commitment. 

Payments. Some apps offer subscription models or premium features that require a paid subscription. These subscriptions provide access to a broader range of guided meditations, specialized programs, and additional features. 

User Experience. The tech aspect ensures a seamless user experience through intuitive designs, simple navigation, and responsive performance. Apps that prioritize user experience are more likely to attract and retain users.

Guided Meditations and Features. Tech enables the delivery of guided meditations, sleep aids, breathing exercises, and other mindfulness features in an interactive and engaging manner. The use of audio, visuals, animations, and progress tracking enhances user engagement and increases the appeal of these apps.

Personalization and Customization. Users can customize meditation durations, themes, and background sounds to create a personalized experience. This level of customization enhances user satisfaction and promotes app popularity.

Subscription Models. Many meditation apps, including Headspace and Calm, offer subscription-based models for monetization. The tech aspect facilitates seamless subscription sign-ups, payment processing, and management of subscription plans.

Data Analytics. The tech aspect allows meditation apps to collect and analyze user data, including user behavior, usage patterns, and preferences. This data helps app developers understand user needs better, improve app features, and optimize monetization strategies.

Social Features and Community Building. Features like sharing progress, joining challenges, or connecting with like-minded individuals enhance user engagement, app popularity, and potentially open avenues for community-based monetization strategies.

So, the tech aspect plays a pivotal role in the popularity and monetization of meditation apps. It enables accessibility, enhances user experience, facilitates personalization, supports subscription models, enables additional revenue streams, provides data analytics, and fosters community building. These factors collectively contribute to the success and profitability of meditation apps like Headspace and Calm.

TBR Group — a Flutter mobile app development company

A completely new application has appeared on the market. It is called Mind Switch. Mind Switch is an app that helps reduce daily stress and treat phobias.

It divides stressful topics into aspects. For each aspect, users watch a special video that affects their brain neural network. 

Mind Switch divides stressful topics into aspects. For each aspect, users watch a special video that affects their brain neural network. Users can select specific bothersome topics from the Mind Switch library.

Mind Switch mobile app: “Topics”, “Thoughts about food” and “Library” pages. 

The challenge and solution

When developing Mind Switch, we faced several challenges. The main goal of the project was to create a system for flexible content management. 

So that app users can visualize all the entire content in the app,   we’ve used a special element called “block” in the backend. 

On the backend side, the client can set up elements to be shown on the specific screen, along with the order they should follow to emerge.

The main challenge of the project was to empower a user to customize the content of the application through the backend.  We applied Firestore to implement such a possibility. 

Hence, the client is not only able to add, remove and change almost all the content on the backend but also to make these changes in real time.

Practically, all the data received from the backend is stored offline. 

We opted for SQLite to develop embedded software. Therefore, any time a user logs in or registers in the application, we obtain all the necessary information from Firestore and load it into the local database. 

The mechanism applied in the app allows updating the data so that the user could operate with relevant data anytime.

Besides, we have developed several versions of the app to run it from the single code base. We use flavors to control the versions. 

Each app version has a particular flavor. As an example, using these flavors, the TBR Group engineers can control which backend should be used.

Key features 

The app users can benefit from several key features available in the app. Such as:

  • Apple and Google email authentication
  • deep links
  • offer codes
  • promo codes
  • Firebase Crashlytics
  • Google Analytics
  • push notifications
  • ratings and reviews
  • subscriptions
  • a video player
  • integration adjustments
  • personal data encryption
  • app theme customization
  • flexible app content management
  • a list of meditations, challenges, and aspects; meditations divided into customized aspects
  • a user profile
  • statistics
  • flavors
  • cloud functions.

Read more about MindSwitch case on our website.


We opted for Flutter and Dart in the project realization.  

The single code base of Mind Switch is platform-independent and therefore can be deployed on mobile devices running both Android and iOS operating systems. 

Plus, we have implemented Firebase as a back-end storage and Firebase cloud functions to run our back-end logic. 

The following technologies have just been executed in the project:

  • Firestore
  • Firebase Storage
  • Firebase Crashlytics
  • Firebase Analytics
  • Firebase Cloud Functions
  • Firebase Dynamic Links
  • Google & Apple Sign In
  • Adjust
  • Adjust Deep Links
  • Subscriptions with Revenue Cat
  • Riverpod
  • SQLite
  • Cryptography

The app is available from the Google Play and Apple stores for users seeking to reduce their stress levels and relax. 

Over 900+ installs have been currently recorded in the Google Play and Apple stores, with a 4.4-star rating out of 56 reviews currently on the Google Play platform.  

TBR Group is working on adding new functionality to the app. 


Meditation apps like Mind Switch have achieved profitability and success by incorporating key functionalities that enhance user experience and engagement. 

A user-friendly interface, diverse content, customization options, offline access, mindfulness tools, and community features all contribute to the app’s popularity. 

By understanding and implementing these functionalities effectively, meditation apps can thrive in the competitive market while promoting mindfulness and well-being among their users.

Why Google invests in Flutter, and what it means for app owners?

With Flutter, feasible and intuitive cross-platform solutions is no longer a miracle. 

After the launch of Flutter’s second version in 2021, over 400,000 Flutter apps were delivered to consumers and installed on hundreds of millions of devices, ensuring a seamless user experience. Currently, there are more than 700,000 published apps in the Apple Store and Google Play platforms.

So, what makes Flutter stand out, and why does Google bet on it?

Why Google invests in Flutter

The Flutter toolkit

Flutter is an open-source tool kit designed for crafting fast, beautiful, and natively felt cross-platform portable applications targeting mobile, web, and desktop solutions and sharing a single code base. 

There have been a few releases of Flutter:

Announcing Flutter 2 – portable devices

Flutter advantages

Flutter is fast with hardware-accelerated graphics and pixel-level control over the UI, with intuitive and live coding. 

Flutter benefits:

Flutter is used by Google for a wide array of software program merchandise, and these Flutter advantages just as well make Flutter the best fit for startup businesses.

What is more, FlutterFlow makes it possible to generate clean code and deploy it to online stores or the web in one click

Plus, due to the aforementioned benefits of Flutter apps, it is extremely easy to build the MVP version of the product and have it shipped to the online audience.

Check the blog article What’s New in Flutter 2 to get acquainted with the technical peculiarities of this release.

It may be helpful to visit the What’s new official resource — a part of the Stay up to date section — for the Flutter and Dart update release updates.

Flutter roadmap

Flutter’s Flutter developer roadmap is to transform the world of software engineering. It will focus on:

  • performance
  • quality
  • security
  • features
  • research
  • updates
  • records and patterns enhancements
  • breakthrough graphics performance
  • smooth integration for web and mobile
  • being early to new and emerging architectures
  • ongoing focus on developer experience

What’s next for Flutter — Roadmap diagram 

The vision for Flutter described in more detail in Flutter Forward video review is going to shed greater light on the Flutter roadmap.

Releasing updates and improvements on a more or less trimestrial basis, the Flutter community and developers want to make certain each and every asked-for feature is being approached.

Google’s plans associated with Flutter

All these Flutter advantages make Flutter come out as a unique, outstanding solution. 

“Here at Google, we’re depending on Flutter, and over a thousand engineers at Google are building apps with Dart and Flutter.”— stated in “Announcing Flutter 2” published on Google Developers blog resource.

Likewise, the major key role of Flutter is proved in What’s next for Flutter: “At Google, too, we’re finding Flutter a valuable tool, enabling teams like Google Classroom to deliver high-quality solutions to mobile and web users…With Flutter, we reduced the code size by 66% for the same functionality… this means less bugs for each platform and less tech debt in the future.” – Kenechi Ufondu, Software Engineer, Google Classroom.

What’s next for Flutter — New directions for Flutter and Dart diagram

One more quotation should be mentioned from What’s next for Flutter official blog post article: “Our fourth and final area of investment for the future is a continued focus on developer experience, across both Flutter and Dart.”

The goal set in front of Flutter is to be a game changer and to fundamentally alter the way the developers build apps. Now not only the platform itself should be in focus, but rather the experience a software engineer wants to create.

Popular apps like WeChat, Grab, Yandex Go, Nubank, Sonos, Fastic, Betterment, and are using Flutter. 


Dart — the programming language Flutter is based on – is a multi-paradigm language, with C-style syntax, which makes it similar to C++, C#, Java, JavaScript, and Ruby. 

Dart is:

  • free
  • open source
  • multi-platform 
  • optimized for UI
  • easy to learn and use, with a familiar syntax

Dart enables software architects to:

  • code efficiently
  • get the advantage of the Hot Reload feature grounded on the just-in-time — JIT — compilation
  • make certain the smooth and seamless app performance is obtained due to AOT — that is ahead-of-time compilation — the compilation of the Dart code into the binary native code directly on the user’s device
  • compile to ARM and x64 machine code for mobile, desktop, and backend/server, or compile to JavaScript for the web
  • craft high-fidelity platform-independent software apps 

Released on October 10, 2011, Dart has passed a few version updates.

Announcing Dart 2.12 – the unique combination of capabilities for building apps

More peculiarities of Flutter and Dart in our Blog articles: 

With this being said, the dilemma of either having to develop multiple apps for multiple operating systems or opting to trade velocity for portability exists any longer.

With Flutter and Dart, your ideas and your creativity come to the forefront.


What do we know about Fuchsia?

Fuchsia was first found in August 2016 on GitHub by media outlets and got reported as a mysterious source code. 

Developed by Google, Fuchsia is open-source software. It is capability-based with a kernel named Zircon. 

Why is Fuchsia so Important to Google? 

  • Fuchsia is expected to ensure Google’s greater control level over its hardware and software platforms
  • The code comprises its ability to be operated on various devices, such as traffic lights, digital watches, smart mobile phones, and tablets, as well as on desktop personal computers
  • One of the aims is to encourage both the Android and Chrome OS communities to contribute to the platform.


So, here we go, summarizing the facts. 

First is Dart — the programming language designed for crafting platform-independent, fast, and beautiful software applications.

Then, goes the Flutter SDK — the environment where the developer is empowered to deploy Dart and other programming tools for shipping these apps, which are unique and magnificent in design, intuitive, and lovely in use.

And, finally, is Fuchsia — a new platform-independent operating system with the possibility of being run on desktops, tablets, cars, traffic lights, as well as on a variety of other electronic devices of similar kind.

All of these statements are the reasons why Google invests in Flutter. The flexibility of code produced and the programming options themselves expand the sphere of use and therefore the degree of overall influence and significant weight in the technical field.

TBR Group — Flutter mobile app development company

TBR Group is a software engineering company located in Ukraine. Our main priority is to deliver multi-platform mobile apps built with Flutter and Dart.

Use cases

Our Cases page displays the benefits of Flutter apps and the selected case studies of the shipped applications in a variety of domains. For instance: 

  • baby care
  • babysitting
  • Text-To-Speech / Speech-To-Text and productivity
  • online medicine
  • veterinary
  • music
  • digital payment


The Swishboom application is an online platform for families to demand babysitting services from caregivers.

Swishboom mobile app: “Address Search”, “Find a Sister” and “Calendar” pages.

Swishboom makes sure that families striving for babysitting services can find eligible care providers.


Babymates mobile app: “Start” and “Chat” pages.

Babymates app has been developed for dads and oriented on how to be fathers in the most fascinating way. 

A dad joke generator feature ensures a new joke to keep the mood high and bright!

Neural Reader

Neural Reader Most Natural TTS — is the Text-To-Speech audio reader, and the Speech-To-Text transcribe tool.

Neural Reader: “My Library”, “Dictation” and “Converting text” pages.


VinciLabs is an online medicine mobile app built with Flutter.

VinciLabs mobile app: “Blood Pressure”, “Measure” and “Take a picture” pages.

VinciLabs was designed to transfer information obtained from the patient’s devices to healthcare practitioners.

Vetsie for Vets

Vetsie for Vets is a pet care multi-platform mobile app providing online veterinary services to pet owners and vet specialists.

Vetsie mobile app: “Text / Audio message”, “Audio call” and “Book a Consultation” pages.

Being fundamental to ensure a smooth workflow for each and every user, the user feels comfortable running the interface alongside the variety of functionalities.

Wywroty Śpiewnik

Wywroty Śpiewnik is a musical app that contains around 25,000 guitar and ukulele arrangements of Polish and songs popular all over the world.

Wywroty Śpiewnik mobile app:  “Start”, “Lyrics and notes of the song” and “Popular” pages.


The mobile app pingNpay — the digital way to pay — is a financial processing program focused on micropayment transactions. The sum of payment should not exceed £20.

pingNpay mobile app: “Pay”, “Receive” and “Create a Dynamic QR Code pages.


This being said, TBR Group has already gained experience in crafting cross-platform mobile apps. 

You are invited to study our expertise and feedback received on our About page. 

You are most welcome to reach out to TBR Group by filling out the Contact Us form. 
We are always happy to help!

Is Flutter going to be right for your next app?

Want to know why you should try Flutter in your next project? What will your business benefit from? Whether you are a director, a technical manager, or any other position that requires making effective decisions in your company and growing your business, this article will be useful for you.
In particular, we’ll help you understand what Flutter is and why it’s the most effective cross-platform framework. You’ll learn about Flutter’s benefits over other cross-platform solutions available and how these benefits play in both development and business processes.

Flutter benefits for mobile app owners

Overall, you’ll get an idea of why Flutter can be a good solution to some of the common problems in business. It can improve your existing mobile app idea. Flutter is a bit different from its competitors in some key aspects. 
Analyzing the Statista report, it’s surprising that the Flutter framework for startups, businesses, and IT projects is the second most popular cross-platform mobile framework among developers. Moreover, around 39% of developers use Flutter, which is a great rise from last year by 9%.

Figure 1. Satistaction with Flutter over time

The report from StackOverflow shows that around 68.8% of developers like using Flutter for new projects and businesses. This number shows Flutter’s benefits, that it is the real winner and most popular technology in the developer’s and business community.

Can the Flutter app be a good fit for your small business? 

Flutter is used for cross-platform application development for iOS and Android using a single codebase.  It comes up with numerous benefits and can definitely help your business grow. 

Given the many benefits of Flutter app development, in particular rapid development, compatibility across platforms, cost-effectiveness, consistent user experience, active and growing community, and so on, Flutter is a fairly new tool that also needs to be improved. But at the moment, the disadvantages of this tool are not so critical that they can hardly be called disadvantages.  

You can find many Flutter advantages for your business:

  • Faster time to market, great for MVP. It’s really so. Flutter is ideal for pushing MVPs and then scaling up. 
  • Cross-platform value-price solution. With Flutter, you can build apps for any platform that belongs to a common codebase. Thanks to this, you can save time and money when compared with the development of individual applications for each platform.
  • Intuitive and feature-rich apps. Optimal user experience is key for your target audience. Apps built with Flutter have lower bounce rates and higher conversions, which leads to more clients and sales.
  • Responsive apps and optimal user experience. If you need high-performance or intuitive user interfaces, go for Flutter. Flutter apps run smoothly thanks to high-quality visuals that users will be delighted with. What’s more, Flutter’s UI support can create a unique user experience.
  • Competitive advantage over competitors. Flutter is the right choice for developing mobile applications for startups and existing businesses, you can create applications for both Android and iOS and gain a competitive edge.
  • A very wide range of niches. Flutter is suitable for healthcare, e-commerce, socials nets, music apps — almost every niche overb there.
  • A variety of tech capabilities for implementing project requirements.

These reasons explain the popularity of Flutter among various global companies such as Google Ads, AppTree, Reflectly and My Leaf, eBay, Groupon, Alibaba Group, and others.
Business owners save money without sacrificing quality and impress customers with an attractive interface. The same team can run powerful apps on mobile, desktop, and web platforms. Despite its young track record, Flutter will be a great choice for mobile apps in 2023.
Some things make a huge difference to the business. These are the stability of the platform, its performance, a wide human resources potential (it is relatively easy to hire a Flutter developer), and a guarantee of successful further development and improvement of technologies/products. The reason is that the problems and shortcomings of the platform or technology in any of these aspects cause the emergence of risks, as well as direct and indirect financial losses for your company.
From this perspective, Flutter can reduce the risks to your business.
Besides, Flutter won’t cause problems in finding engineers because there are already a lot of fans among Android developers in the community (reviews can be found everywhere).
Compared to the available alternative cross-platform approaches, Flutter poses minimal risks to companies and is therefore worth it to be the number one choice for your business.

TBR Group — a Flutter mobile app development company

We are TBR Group — a group of Ukrainian software engineers specializing in platform-independent software and Flutter and Dart programming tools.

There is a set of cross-platform mobile applications built with Flutter and Dart in the TBR Group’s portfolio, in particular:

We’re proud to be associated with apps that revolutionize industries and change the lives of millions. A combination of expertise, an agile approach, and commitment makes us a reliable tech partner Flutter.

By default, every case is bespoke and demands a tailored approach. We dive deep into the peculiarities and business needs rather than create development patterns. Being experts in telemedicine, veterinary, baby care, music, and TTS solutions, we’re open to new markets and domains.

Let’s have a brief call, and we’ll persuade you why you need TBR Group as a tech partner.

More information about Flatter you can find in our article


So, Flutter’s advantages are brilliant, this is probably the best mobile app development framework to build apps for iOS, Android, and Windows, which implies faster development and cost savings. Its benefits can help not only existing businesses but startups with a small budget to enter the market fast. By hiring Flutter developers, companies can create MVPs, scale them up, grow the clientele, boost sales, etc. If you are interested in such advantages for business — you can safely use a Flutter. 

Hiring Ukrainian developers in 2023: opportunities and risks

If you are interested in startups and quality software development, if you are a project manager or a deal maker, this article is for you.
Today,  we’ll speak about the actual situation in the Ukrainian IT market in 2023. We will show how the market of IT outsourcing services has changed in Ukraine after the Russian invasion; which factors make Ukraine one of the most attractive options for starting outsourcing software development.

The key benefits of IT outsourcing in Ukraine

Outsourcing is one of the most sought-after services in some areas of business. At the same time, for some countries, it is one of the main sources of foreign trade revenue. 
Over the years, the Ukrainian IT industry has been able to gain attention and interest from employers far beyond Ukraine. The formula for success here is quite simple — good training of specialists, their conscientiousness and diligence, and relatively lower salary expectations compared to programmers from the USA, Great Britain, and Western Europe.
However, the war and economic crisis made adjustments to this beautiful picture. The top management community of IT companies is increasingly talking about the need to allow programmers to travel abroad, and at the same time warning that this may threaten the economy and lead to an irreversible flow of IT emigration.

Reasons for outsourcing: Why hire software developers in Ukraine? 

Let’s start with a few facts:

  • The majority of Ukrainian clients are from the USA, Western Europe, and Great Britain
  • There are more than 200,000 highly skilled IT specialists in Ukraine
  • There are around 100 R&D centers that represent or partner with such companies as Siemens, Samsung, Oracle, eBay, Google, etc
  • 50% of Ukrainian developers have 2–5 years of experience on average
  • More than 100 Fortune 500 companies used Ukrainian IT services
  • Ukraine has around 40 universities providing computer science education
  • IT services exported from Ukraine in 2020 equal more than $5 billion

A year ago, the number of vacancies in the Ukrainian IT industry significantly exceeded the supply of specialists. According to the IT Ukraine Association, every year Ukrainian educational institutions graduate up to 20 thousand technical specialists, but the market needs at least 55 thousand.

In 2013, the Ukrainian IT industry ranked fourth in the world, after the United States and India, in terms of the number of certified programmers. In 2016, Ukraine was ranked 11th among the top 50 countries with the best programmers (HackerRank resource rating). At the same time, according to the, there were 90,000 IT specialists in Ukraine. Every year, their number increases by about 20%. 

Annually, the demand for IT specialists in Ukraine grows by 30%, primarily due to the colossal growth in requests for IT services.
Ukraine is an excellent destination for startup development because of the large pool of talent, good level of English proficiency, strong education, reasonable pricing, high flexibility, high level of stress tolerance, convenient time zone, high quality, flexible environment, culture fit, skill diversity, development center. 

Despite Russia’s full-scale war against Ukraine, the Ukrainian IT industry continues to function and develop. Foreign companies can hire Ukrainian developers with acceptable risks, build an awesome product together, and support the entire Ukrainian economy.

These facts are confirmed by TBR Group, which worked throughout the war period and based in Ukraine.

Ukrainian developers continue not only to perform their work at a high level and constantly improve their skills and develop. According to, Ukrainian developers are proficient in the following programming languages: JavaScript, Java, C#, Python, PHP, TypeScript, Swift, Ruby, Kotlin.

Multiple world-recognized startups have been born in Ukraine, including Grammarly, Reface, and AirSlate.
Now many startup founders and potential clients of Ukrainian IT companies have concerns about hiring software developers from Ukraine for their startups due to the risks associated with wartime. 

Risks of hiring developers in Ukraine in 2023?

Before the war, many companies worldwide wanted to work with Ukrainian developers because they found many strengths in this collaboration.

The current situation has changed due to new risks. So do attitudes — some of the potential clients prefer hiring developers beyond Ukraine. 
According to the IT Ukraine Association report, most of the IT companies retained customers and contracts during the war, despite all the risks stated by customers. 

About 52% of companies kept 100% of their contracts, 32% of companies — 90–99% of contracts, and only 16% of companies lost 10% or more of their contracts. Yet, the main factors of maintaining customers are:

  • high level of customer loyalty
  • long-term partnership
  • delivery stability
  • constant communication with clients
  • rapid stabilization of business processes
  • quick relocation of the employees
  • high quality of services, even in wartime

Currently, about 2% of the IT market has been drafted into the military service, which is approximately equal to the percentage of failure to pass the probationary period in the niche. This leads to the conclusion that the risk of mobilization of critical specialists is not that high.

At the beginning of the war, IT companies evacuated employees to safer regions.  There are still some work disruptions like blackouts, electricity cuts and Internet outage. 

All this can lead to work disruption, violation of deadlines and team composition alterations. 

Despite the existing risks, the Ukrainian IT industry showed record growth in export earnings in the first quarter of 2022. 

The volume of computer services in Ukraine for 10 months increased by 13%, and exports — by 23%. This was reported by the press services of the Ministry of Economy.

According to the Association “IT Ukraine”, the IT sector showed an increase of 13%.

“Enterprises of the sphere paid UAH 48 billion in taxes for this period. More than half a billion dollars are aimed at supporting the Armed Forces of Ukraine and the humanitarian sphere,” the report said.

Exports of computer services grew by 23% compared to the previous year. Ukrainian IT companies attracted $350 million of investments, even in military conditions, more than 80% of companies retained about 100% of their contracts.

TBR Group — an experienced Ukraine-based development company

Despite the wartime, our company continues to work productively. TBR Group is about flexibility, trust and meaningful choices.

Working at TBR Group means being a part of a community that values growth, mutual trust and respect. We care about creating sustainable software, the effect our activity has on the world, and each employee’s experience. 

TBR Group helps startups and established business evolve through design and development and overcome emerging challenges. We’ll give your product idea an efficient shape and functionality.

We work with world-class clients and get outstanding experience as a part of TBR Group from the various niches: social network platforms, TTS readers, healthcare, vet business, micropayments, etc. 
The products we build may be completed, but the cooperation is never finished. We offer post-launch support and maintenance to help clients continually improve the quality and enlarge the scope of their products. We’re open for long-term collaboration.


Despite the difficult times, Ukrainian IT specialists continue to work fruitfully.  Our business approach follows the best industry practices. TBR Group — an experienced Ukraine-based development company. Our company continues to provide services of various kinds: mobile development, web development, product design, support and management. We understand that there may be risks of a different nature, but our company, and team is ready for them.

Discover the steps of creating a micropayments mobile app in 2024 with TBR GRoup

In the era of globalization and smart everythings, a firmly established web presence appears crucial.

By addressing challenges posed by digital technology, an enterprise can stand a chance of building a prosperous online business.

In this article, we are going to brief you on platform-independent text-to-speech mobile app development.

What technology should furnish the idea in the best possible way?
And what pitfalls could there be on the way?

In case mobile development relates to the react-style framework Flutter, such issues become specifically relevant.
“Read the text out loud” techniques have come into widespread use and the number of app downloads is rising rapidly.

Furthermore, the “Forecast growth of the artificial intelligence (AI) software market worldwide from 2019 to 2025” is expected to witness a sustained increase.

What is text-to-speech software?

Speech synthesis refers to the synthetic output of human beings’ speech. Text-to-Speech technology is a method for rendering the text into a real-time voice.

It’s part of machine learning, data mining, and artificial intelligence technologies.

Simply put, Text-to-Speech synthesis —TTS — produces the voice. Text-to-speech solutions should not be confused with speech recognition techniques, which are concentrated on voice recognition and translation practices.

You might have come across such definitions as voice synthesis or text-to-voice technology, which actually define the same notion.

TTS readers could be a perfect match for both increasing productivity and helping those suffering from dyslexia, vision impairment, and such like.

Based on preferences, users can choose:

  • languages;
  • gender;
  • speed;
  • quality.

In their vast majority, text readers allow users to upload files of various text formats or connect to file-sharing apps, such as DropBox and OneDrive. It is as well possible to download the required files from a local device.

A reading style can be adjusted to auditory, visual, or a compound array of both.

Configuring screen layouts is another option available for software users.

How to develop text-to-talk apps?

Getting a clear comprehension of how to craft a text-to-voice mobile app is significant.

You will need to define the goal and the target audience.

The discovery and the business analysis stages are crucial as they will determine the overall strategic course.

Right after the research has been done, it is time for designs to get created and code written.

You may either try using a pre-created mobile app design tool to draw designs for a mobile text reader app.

Extending the development opportunities, you may reach out to a software engineering company.

The mobile software development could be

  • native;
  • web;
  • cross-platform.

Plus, each and every technological stack features its peculiarities.

Elaborating on the development stages, we dive deeper into the domain in our Building a pet care app with Flutter: TBR Group guide, and Why choose Flutter for mobile app development in 2022?

A quality assurance specialist is to test the brand-new app and ensures its impeccable performance. A phase of testing is highly essential before launching the product to a broad audience.

As the app is uploaded into the App Store and Google Play stores, it becomes available to get downloaded by all those interested.

The post-launch is all about supervising the correct performance of the text reader and adding new features and updates.

How much money does it cost to build text-to-voice mobile apps?

When it comes to the median price of crafting a text-to-speech Android or iPhone app, the cost will depend upon a few factors.

As an example, the Flutter engineer’s earnings are hourly based and depend upon the location region. Likewise, in Eastern Europe, the rates fluctuate between $40–60 and the USA pays $100–200 per hour on average.

The article Pros and cons of dedicated teams for mobile app development will cast some more light on the problem of choosing an appropriate team to fulfill the project.

Examples of text-to-talk apps

Just to name a few, some of the most top-rated Google text-to-speech and text-to-speech iPhone software solutions are:

Text to speech book readers might serve as efficient aids both at the time of work and leisure or during a learning period.

Neural Reader — a Text-To-Speech mobile app developed with Flutter: TBR Group’s experience

Neural Reader refers to the Productivity section in the App stores. It is a text-to-speech and speech-to-text cross-platform mobile app built with Flutter.

Please, read through a complete Neural Reader case study on our Cases page.

Converting the text into audio, the app allows people suffering from impaired vision to listen to their text inputs.

People, who cannot hear well, may see audio transcripts. This way, the app converts a real-time audio speech into text.

Opportunities for users vary from general account setting options to the key functionality of the application.

Neural Reader mobile app: “Settings” pages for authorized and non-authorized users.

It is possible to personalize the client’s member area.

Neural Reader mobile app: “Settings Language”, ”Language”, ”Settings Voice”, and ”Settings Text Size” pages.

Allowing for a large range of files to get uploaded, Neural Reader makes sure customers can pick up the required format.
Such as:

  • text and word docs;
  • EPUB and PDF;
  • dictations,
  • web article links;
  • image files.

Neural Reader app: “My Library” pages.

A consumer can benefit from the next features:

  • files import;
  • language choice;
  • audio player;
  • audio and text conversion;
  • text transcription;
  • data storage;
  • dictation;
  • voice preferences;
  • font size;
  • audio replay speed.

Neural Reader mobile app: “Audio player” pages.

A user can convert the files from the:

  • image;
  • text;
  • files of the supported extensions.

Neural Reader mobile app: “Convert from” pages.

A user is able to:

  • log in to the account;
  • choose between the subscription options;
  • apply the required settings;
  • share feedback.

The artificial neural network technique and the Flutter framework have been applied in the project to realize the natural language processing technology.

In a nutshell, Flutter can be defined as a software development kit, a framework. Flutter contains development tools for code conversion.

So, a code base written in Dart is transformed by Flutter into a machine code that could be understood and executed on mobile devices with iOS or Android operational systems, as well as Web solutions.

By employing the Flutter framework and the Dart programming language, we were able to craft a cross-platform mobile app natively felt on iOS and Android.

More of Flutter is written in our article The fundamentals of Flutter & Dart on the Blog page.


TBR Group is a Ukrainian company focused on platform-independent mobile app development.

Having completed a number of projects, we will gladly advise on any scope of work for your project.

How to craft a micropayment mobile app in 2024?

As an online reader, you may be searching for information on how to use your mobile phone to pay goods off or remunerate agents and other third parties.

And indeed, payment mobile apps are a great favorite with clients for contactless payments or P2P transactions.

What about micropayment mobile apps? Even though small payments are rather popular these days, it could be pointless making low-value transactions due to the high service fees imposed.

In this article, we are going to describe the main steps in crafting a mobile app for small payments and get acquainted with the most favored low-value mobile payment applications.

How to build a micropayment mobile app in 2023?

Building a micro payment service mobile app, as well as any piece of programming, takes time, effort, and careful consideration.

As such applications deal with monetary transactions, you will need to make an effort with the prearrangements and define all the financial regulations and laws relevant to your scope of activity.

Well, how to create a payment processing mobile app?

There are a variety of options for how to craft a mobile micropayment app.

Before advancing to any technological solutions, your initial objective should be concentrated on:

  • the idea;
  • designs;
  • software implementation;
  • quality assurance testing;
  • post-launch period support.

The entire bunch of works could be carried out by:

  • freelancer geeks;
  • outstaffed specialists;
  • a dedicated team or company.

Hiring a dedicated development team means employing tech experts from a single source. Our article Pros and cons of dedicated teams for mobile app development will bring out more info in this regard.

Here is how each participant is steadily working towards your company’s goal.

A project manager is responsible for carrying out the entire project successfully and smoothly. The PM has to define requirements and objectives clearly, as well as evaluate the scope of tasks, the cost of the project, and its time limits.

A designer will deliver the look of the application. Whereas the software engineers will provide the code implementation. After the app has been coded, the QA will assure its seamless performance.

A closer look at all the development stages is provided in:
Building a pet care app with Flutter: TBR Group guide. For all those interested, this reference article will be fun to dip in and out of.

The specifics of the mobile app for small payments

Contactless payment is a safe and convenient way to process financial transactions. It implies a bunch of technological decisions, both hardware devices, and software solutions.

During contactless payment, the card details are not transmitted.
For each contactless operation, a one-time unique code is created, which is a token. The code does not reflect the account number, card number, PIN code, or any other sensitive information.

3-D Secure protocol is an additional layer of security for online credit and debit cards to ensure two-factor user authentication.

What are micropayments?

Micropayments are transactions focused around $1.00 in value. In a broader sense, they are basically small remittances that cover money transfers from $1 to $20 at a time.

Similar terms related in meaning to micropayments are:

  • small payments;
  • low-value payments;
  • micro transactions.

What are mobile payment applications?

In a nutshell, mobile payment applications — sometimes called digital wallet apps — are software programs allowing mobile payment processions.

By leveraging their comparative strengths, customers can benefit from

  • speedy payments;
  • simplicity in use;
  • reliability and safety.

How do micropayments work?

To start using one of the micropayment digital wallet apps, it is required to follow the steps listed below.

So, the customer needs to:

  • download and install a mobile app from an eligible source;
  • create either a personal or a business account;
  • indicate a phone number and email address;
  • connect the account to the source of funds — a debit card, a credit card, or a bank account. It will be necessary to set up micropayment methods available in the app;
  • make sure to enable multifactor user authentication and the SMS payment confirmation;

As soon as the application has been installed and adjusted, the user can run it.

What are micropayment methods and features?

Micro payment options allow

  • money transfers;
  • internet acquiring;
  • purchasing goods and services from retailers;
  • online shopping;
  • etc.

Micro payment methods ensure payment submission in a couple of ways.
It is possible to enable customers to opt for paying via

  • peer-to-peer transactions;
  • pools of funds;
  • a QR code;
  • links;
  • buttons on the website;
  • contactless payment in the physical store.

Nice-to-have features

  • branded credit cards and debit cards;
  • support for Bitcoin or other cryptocurrencies;
  • cash-back offers;
  • etc.

Network fees & transaction charges

For a mobile app user, a difficulty may emerge in processing micropayment transactions in the credit card world.

The issue may concern the transaction charges set by the banking system.

Many merchant processors can just as well charge network fees and imply transaction charges, making low-value payments non-profitable in a way.

Starting off with the release of your micro payment service app, as a product owner, you will need to consider applying any possible network fees or transaction percentage charges. Hence, the application can either include percentage fees or come with no extra fees added.

Home / foreign market segments coverage

Mobile apps for small payments can operate in the internal market area, or cover overseas monetary transfers.

Credit card data collection

The app can share personal data with 3-rd parties, or can skip such an option and keep the sensitive data just for internal purposes.

Examples of most used mobile payment apps

All of these software payment applications are striving to make monetary transactions easy, reliable, and safe.

To exemplify some of the most preferred, most used mobile payment apps, we will offer you a list below.

It includes, without limitation

These applications aim to follow security protocols and standards.

pingNpay — a micropayment mobile app built with Flutter

As a platform-independent mobile app, pingNpay is centred around processing micropayment transactions. The micropayments are usually those at a value of £10 each.

What is really nice about the pingNpay mobile app is the simplified way of processing low-value payments. And the overriding factor is that the small payments have been made profitable.

pingNpay mobile app: “Type”, “Date” and “Home/History” pages.

We have implemented Blockchain technology to make all the payment procession well-protected.

Representing a different approach in the payment procession sphere, Blockchain acts as a method to enforce security and simplify monetary deals of any scale.

pingNpay mobile app: “Pay”, “Receive” and “Create a Dynamic QR Code” pages.

The pingNpay mobile app enables

  • deep-linking;
  • branded QR codes;
  • a QR scanner;
  • P2P transactions;
  • encryption and decryption;
  • user authentication;
  • push notification;
  • Native Share for QR codes and links.

pingNpay mobile app: “Scan QR code” and “Show your QR code” pages.

A user can choose either a Static QR or Dynamic QR code to send and receive a microtransaction. It is also possible to send funds using a permanent link.

pingNpay mobile app: “Home” pages.

In the pingNpay app, we have integrated

To make more sense of the implemented functionality, challenges, and solutions, you are invited to our pingNpay case study page.

The onboarding pages make certain that a user gets all the directions on how to successfully start using the app.

pingNpay mobile app: onboarding pages “Buy”, “Pay”, and “Live” pages.

There is a home page and the pages designed for making monetary micropayments, QR code scanning, history transactions, settings, and contacts.

pingNpay mobile app: “Contacts” and “Send a payment request page” pages.

Being a cross-platform mobile application, pingNpay can just as well operate on web devices.

Our team — TBR Group — used Dart and Flutter to craft the pingNpay micropayment mobile app. pingNpay is fast, reliable, and exceedingly user-friendly.

Whether it is an interaction with the data level and drawing the UI, or carrying out heavy calculations — Flutter handles the entire scope of data processing.

Flutter makes the code

  • swift;
  • simple for testing;
  • reusable.

You are welcome to read our articles The fundamentals of Flutter & Dart, and Why choose Flutter for mobile app development in 2022? This way, you will find out a little more about the Flutter framework and the Dart programming language.


TBR Group is a Ukrainian software development company. We specialize in cross-platform app development with Flutter and Dart.

Having completed cross-platform projects with Flutter and Dart, we were able to build:

  • a stable MVP version of the product;
  • beautiful and powerful mobile apps.

Plus, opting for a dedicated team will give you heart and support in achieving your goals. Besides, an inclusive approach to the working process is our first priority.

Template generation with Mason : TBR Group experience

1. Template Generation in Flutter.

Code generation allows you to speed up and make the development more convenient by generating ready-made pieces of a code.

This can be used to preset the architecture of an application, for example. If you want to use the wedge architecture pattern, then you will have to spend a lot of time creating all the folders and files.

Template generation will save you this time and enable you to jump right into the development with a quick start.

Also, template generation helps not only with the architecture setup, but also speeds up the development itself.

For example, we used template generation to automatically create repositories to save time and make developers create unit tests for their code, since our template, together with the repository, creates a template with tests for this repository in the test directory.

There are a large number of approaches to generating templates in Flutter, we chose Mason package, because it is the most popular, constantly developing and improving package, which also has its own hub containing bricks (templates) that can be used with this package.

2. About Mason package

Mason is a Flutter code generation tool that helps developers create reusable code blocks, called “bricks”, for their Flutter projects.

These bricks can contain any type of code, from UI elements to business logic, and can be easily imported into any Flutter project using the Mason command line interface (CLI).

One of the main benefits of using Mason is that it allows developers to easily share their code with others, making it easier for teams to collaborate and reuse the code.

Additionally, Mason makes it easy to create and manage code templates, which can save developers a lot of time and effort when starting new projects or adding new features to existing ones.

Using Mason and the Brickhub can provide a number of benefits for Flutter developers, including:

  • Time saving: By using reusable bricks, developers can save a lot of time and effort when starting new projects or adding new features to existing ones.
  • Improved collaboration: Mason makes it easy to share bricks with others, which can improve collaboration within a team and make it easier to reuse code.
  • Consistency: Using a common set of bricks can help to ensure that projects have a consistent look and feel, which can be especially useful for larger projects or teams.
  • Increased efficiency: By using Mason, developers can focus on more important aspects of their projects, rather than spending time writing a boilerplate code.

Overall, Mason and the Brickhub provide a powerful tool for Flutter developers looking to save time and improve their workflow. Whether you’re a seasoned developer or just starting out, Mason can help you create high-quality, reusable code for your Flutter projects.

3. How to install Mason

Official documentation recommend installing mason_cli from

# 🎯 Activate from
dart pub global activate mason_cli

Alternatively, mason_cli can be installed via homebrew

# 🍺 Install from
brew tap felangel/mason
brew install mason

Once you have successfully installed the mason_cli you can verify your setup by running the mason command in your terminal. If mason_cli was installed correctly, you should see something similar to the following output:

🧱 mason • lay the foundation!
Usage: mason <command> [arguments]
Global options:
-h, --help Print this usage information.
--version Print the current version.
Available commands: ...

4. How to install Mason

We will describe how to create your own break using as example our simple_repository brick.

Use this command to create the new brick:

mason new simple_repositoty

It will create a new, custom brick template in the current working directory.

5. Detail

It should generate such file structure:

├── __brick__
└── brick.yaml

The brick.yaml file is a manifest which contains metadata for the current brick. The newly generated brick.yaml should look something like:

name: simple_repository
description: Brick for the simple creating repositories and tests for them.
version: 0.1.0+2
mason: ">=0.1.0-dev.26 <0.1.0"
type: string
description: Repository Name
default: Dash
prompt: What is your repository name?

The __brick__ directory contains the template for your brick. Any files, directories within the __brick__ will be generated when the brick is used via mason make.

In the example brick, our __brick__ directory contains a such files structure:

├── __brick__
│ ├── lib
│ │ ├── {{repository_name.snakeCase()}}
│ │ │ ├── {{repository_name.snakeCase()}}_repository
│ │ │ │ └──{{repository_name.snakeCase()}}
│ │ │ └──api_{{repository_name.snakeCase()}}
│ │ │ └── api_{{repository_name.snakeCase()}}
│ │ └── {{repository_name.snakeCase()}}.dart
│ ├── test
│ │ └── repositories
│ │ └── {{repository_name.snakeCase()}}
└── └──

Templates currently support only Mustache syntax, we will create our template using it.

Mason supports a handful of built-in lambdas that can help with customizing generated code:

NameExampleShorthand SyntaxFull Syntax
lowerCasehello world{{variable.header
mustacheCase{{ Hello World }}{{variable.mustache
sentenceCaseHello world{{variable.sentence
titleCaseHello World{{variable.titleCase()}}{{#titleCase}}
upper CaseHELLO WORLD{{variable.upper

{{repository_name.snakeCase()}}_repository.dart file:

abstract class {{repository_name.pascalCase()}}Repository {}

{{repository_name.snakeCase()}}_repository.dart file:

/// {@template api_{{repository_name.snakeCase()}}repository} /// [{{repository_name.pascalCase()}}Repository] /// {@endtemplate} 
class Api{{repository_name.pascalCase()}}Repository extends {{repository_name.pascalCase()}}Repository { /// {@macro api{{repository_name.snakeCase()}}_repository} 

{{repository_name.snakeCase()}}.dart file:


{{repository_name.snakeCase()}}_repository_test.dart file:

import 'package:flutter_test/flutter_test.dart';

void main() {
group("Testing {{repository_name.pascalCase()}} Repository", () {
//TODO: implement the tests

setUp(() {});
test("Test method", () {});

6. How to publish brick to the Brickhub

To publish a brick to the Brickhub using Mason, you will first need to sign up for an account on the Brickhub website.

To do this, you will need to request access to the site, and then follow the instructions in the email invite to sign up and verify your email.

Once you have an account, you can log in to the Brickhub using the mason login command.

This will prompt you to enter your email and password, and once you have successfully logged in, you will be ready to publish your brick. To publish a brick, you will use the mason publish command, followed by the –directory option and the path to your brick’s directory.

For example:

mason publish --directory ./my_brick

This will start the process of publishing your brick to the Brickhub.
You will be prompted to confirm that you want to publish the brick, and once you confirm, the brick will be bundled and published to the Brickhub.

It’s important to note that you will need to be logged in to an account in order to publish a brick to the Brickhub.

Overall, publishing a brick to the Brickhub is a straightforward process that can be accomplished quickly and easily using the Mason CLI.
By making your bricks available on the Brickhub, you can share them with other Flutter developers and save time and effort when working on your projects.

7. Hooks

Mason supports Custom Script Execution so called hooks.

These hooks are defined in the application’s configuration and can be executed before or after certain events occur, such as the generation of code or the rendering of templates.

Currently, Mason only supports hooks written in the Dart programming language.

These hooks are defined in the hooks directory at the root of the brick and must contain a run method that accepts a HookContext from the package:mason/mason.dart library

There are two types of hooks available in Mason: pre_gen and post_gen, which are executed immediately before and after the generation step, respectively.

These hooks can be used to perform tasks such as logging, modifying the brick variables, or interacting with the logger.

For example, hooks for running dart formatting.

Future<void> _runDartFormat(HookContext context) async {
final formatProgress = 
context.logger.progress('Running "dart format ."');
await'dart', ['format', '.']);

Future<void> _runDartFix(HookContext context) async {
final formatProgress = 
context.logger.progress('Running "dart fix --apply"');
await'dart', ['fix', '--apply']);

8. What benefits we have got

Using Mason templates has provided a number of benefits for our development process, including:

  • Faster development: By generating ready-made pieces of code, we were able to speed up development and jump right into creating new features or working on existing ones. This saved us a lot of time and allowed us to focus on more important tasks.
  • More structured code: Using Mason templates helped us create a more structured and organized codebase, which made it easier to maintain and scale our projects. We were able to create a consistent structure for our code, which made it easier for new developers to understand and work with.
  • Forced developers to write unit tests: One of the benefits of using Mason templates is that they can be customized to include certain requirements or best practices. In our case, we used templates to force developers to write unit tests for their code, which helped us to ensure that our code was well-tested and of high quality.

Overall, using Mason templates has helped us to improve the efficiency and quality of our development process, and has made it easier for us to create and maintain high-quality code for our Flutter projects.

Native vs cross-platform app development: what to choose in 2023?

There are questions a mobile app engineer encounters each and every time and has to query about before starting off to write any software product.

How to transform a given idea into a viable market product?
Would it be far better to opt for a cross-platform framework instead of picking up the native development scheme?

For a business owner, there is a dilemma as well. How to create a competitive product in the most economically profitable and time-saving way?

It goes without saying that in either case, the product at the outlet must be of a high programming standard.

So, native vs cross-platform? As each of them can be used to serve different objectives. The competition is tough.

And in the “Interest over time” search queries in Google Trends, cross-platform development has gained popularity over the native model.

Google Trends “Explore what the world is searching” page.

Just as well, both Flutter and React Native have ranked at the top among the most frequently used libraries and frameworks in 2023 in Statista.

Is there a real dilemma native vs cross-platform development?

As both approaches do have their benefits and limitations, we would like to do an overview of these models.

Mobile application development falls into:

  • web
  • native
  • cross-platform / platform-independent:

– hybrid

– native.

Native implies building different mobile app versions for the iOS operating system and Android platform. So:

  • iOS supports Swift and Objective-C as the programming languages;
  • whereas those intended for native Android are based on Java or Kotlin.

The cross-platform approach in mobile programming includes a set of technological solutions as well. Such as:
The Ionic and Cordova frameworks belong to the hybrid cross-platform mobile application development.
React Native, Native Script and Flutter represent the native approach.

Let’s say a few words about web mobile solutions. The apps are coded with HTML, CSS, and JavaScript programming language.

Without having to be installed, the apps are available on all platforms and run directly in browsers of mobile devices. This option is a perfect choice for simple software products.

Native approach

With the totally distinguishable native code base and distinctive UI design elements, these applications demonstrate the highest efficiency in operation.


  • high performance;
  • better user interfaces;
  • an ability to use all the features of mobile devices;
  • intuitive user interface and user experience.


  • a pricier solution;
  • posing more challenges in communication and collaboration in teams;
  • hardly going to help implement the same logic of both iOS and Android apps.

Cross-platform/platform-independent approach


  • economically profitable/cost-effective;
  • shareable code base;
  • shared logic;
  • possibly similar UI and user experience;


  • possible performance issues;
  • a bit low operational flexibility;
  • UI inconsistencies, etc.

In native cross-platform app development, Flutter and Dart bundle plays a major role.

Flutter offers different models, tools, and patterns for implementing the logic of an app and delivering the relevance of the inquiries.

Hence, the stakeholders are welcome to take an advantage of:

  • a rapid market period;
  • a simpler process of the MVP creation;
  • a payment compensation plan;
  • utilizing in multiple market niches;
  • a shareable code base
  • a low learning curve for a software engineer.

In conclusion

You should choose a native approach if the application is a complex and resource-intensive one, intended to perform heavy calculations. In this case, you should be prepared for an obviously long time-market period, and for high development costs.

You can also aim to

  • relatively quickly, create a stable MVP version of the product;
  • get a scalable application;
  • obtain one shareable code-base;
  • save on expenses and time.

In this scenario, you should go for a native / hybrid cross-platform option.

For entrepreneurs, it would be advisable to opt for a dedicated development team to get the mobile app crafted. We have an article: “Pros and cons of dedicated teams for mobile app development” articulating this topic.

If you feel like being provided with extra details on this relatively new, however famous tool set, you are invited to visit our Blog page.

Cross-platform mobile app development with Flutter: TBR Group’s experience

TBR Group has focused on cross-platform framework programming, rather than picking up an option of native development.

Having completed software implementations with Flutter and Dart, we feel certain to highlight the benefits being offered by the native cross-platform app development.

We have applied Flutter cross-platform to program mobile apps for various intended purposes and market sectors. Such as

  • baby care babymates;
  • babysitting network Swishboom;
  • veterinary Vetsie;
  • digital payment pingNpay;
  • online medicine VinciLabs;
  • productivity/work Neural Reader;
  • music Wywroty Songbook.

Below goes a description of some of them.

VinciLabs is a healthcare mobile app built with Flutter.
The app has been designed to transfer data received from the patient’s devices to the health care providers.

The devices could range as follows:

  • a pulse oximeter;
  • a blood glucose monitor;
  • a blood pressure measurer;
  • other similar devices.

Hence, after being received, medical records are kept and elaborated by the health care organization.

VinciLabs mobile app: “Blood Pressure”, “Measure” and “Take a picture” pages.

VinciLabs enables users to

  • send a photo with measurements;
  • proceed with the optical character recognition option;
  • organize statistical data for a display in the form of charts and graphs;
  • notify the doctors about higher or lower-than-normal indicators;
  • insert indicators manually;
  • create a user’s profile;
  • get help in the FAQ section.

Vetsie is a veterinary application designed in 2 versions:

  • for the pet parent;
  • for the veterinary staff.

Vetsie mobile app: “Book Consultation”, “Book and Pay” and “Add Vets” pages.

Users can favor from the following functionalities:

  • user authentication;
  • video and audio calls;
  • push notifications;
  • chat, text, and voice messages;
  • subscription;
  • payment opportunities;
  • history of interactions;
  • etc.

pingNpay relates to the sphere of digital payments. Designed for all those willing to process the smallest donations, it allows up to £20 payment in one go.

As blockchain technology has been implemented, these small online payments have been made profitably available to users without increasing security risks.

pingNpay mobile app: “Home” and “Home/History” pages.

pingNpay makes it possible for users to:

  • have a quick onboarding;
  • choose QR codes for making payments;
  • have a list of contacts;
  • store the transaction history;
  • indicate the payment due date;
  • work out payment requests.

babymates is a mobile application designed for dads on how to be a father in the most exciting way. babymates is built to digitally connect dads with the service created.

There is user authentication, and it is possible to set up a member profile and join the community.

Babymates mobile app: “Start” and “Chat” pages.

The users can take advantage of the following features:

  • user’s profile;
  • building a personal network;
  • sharing photos;
  • online chat;
  • map integration;
  • events;
  • contact form;

The dad joke generator section will ensure a good mood for the rest of the day.

Wywroty Śpiewnik is a musical application, containing around 25,000 guitar and ukulele arrangements of Polish and internationally famous songs.

Wywroty Śpiewnik mobile app: “Start”, “Lyrics and notes of the song” and “Popular” pages.

Wywroty Śpiewnik allows users to:

  • authorize into the user account via Facebook, Google account, or Apple ID credentials;
  • create a list of favorite songs;
  • search for singles;
  • active Day/Night mode;
  • benefit from Google Ads.

In every case, TBR Group aimed to ensure a smooth workflow of the app for each user. So that the users could feel comfortable running the interface alongside the variety of functionalities.

You are invited to our Case study page to obtain more details on the peculiarities and challenges we had to overcome.


TBR Group is a Ukrainian software development company. Our activity is centered around platform-independent mobile app programming with Flutter and Dart.

We have chosen Flutter cross-platform because it allows creating fast, reliable, and scalable and powerful software products, with a stable MVP version of the application.

Our track of implemented mobile solutions can exemplify the potential of the technology, as well as our expertise in it.

You are welcome to get connected to TBR Group and to communicate the objectives of your existing or future product with our team. Feel free to contact us at your convenience and in any timely manner of yours.

Unlock the secrets of mastering the BLoC pattern in Flutter with TBR Group’s expertise.

MVC, MVP, MVVM, Vanilla, Scoped Model, and BLoC Flutter… These are the architectural patterns, the models, which appear to be rather popular among software engineers nowadays.

But what type of mobile app structural organization to choose and which approach to the architecture should be applied?

This article will be centered around the practical approach of BLoC pattern implementation to the mobile crypto app niche.

The ABC of Flutter BLoC pattern

Being a declarative framework, Flutter implies using one of the state management approaches to build the UI and therefore reflect the current state of the application.

Flutter BLoC can be specified as a state management system belonging to the family of stream/observable-based patterns.

The main advantage of state management: it helps the developer to separate business logic from the presentation layer. It makes the codebase more clear, reusable and indepenend.

Key pros of BLoC over other state management models:

1. It’s a very popular state management system, and, as a result, there is big amount of live projects and a big dev community who is willing to share their experience.

2. It comes with easy-to-understand and well-detailed documentation. It contains lot’s of examples helpful to kick-start with BLoC.

3. Frequent updates and regular support from the authors.

4. It has the extension for Android Studion and VSCode that speed up the development process

We’re going to expand the topic, by articulating more practical aspects of this technology.

Using Flutter BloC for developing mobile apps: TBR Group’s case study

You can freely find the bitty official documentation and tons of info concerning the topic on the web.

But alongside such a diversity of information, there’s a lack of real case studies and Flutter BLoC examples.

We are going to demonstrate the BLoC pattern in action on the example of a single use case — a Crypto Aggregator mobile app.

Crypto Aggregator is a mobile app designed to browse through cryptocurrencies and market data.

The users can check how the data is changing with the help of the line and pie charts.

The Crypto Aggregator’s settings screen provides its users with a set of features allowing them to switch:

  • the fiat currency;
  • between the night and day mode;
  • the language of the application.

The Crypto Aggregator mobile app: the “Settings” page.

While implementing the BLoC pattern, the first step is to determine the states and events classes.

State implies the output data. Actually, the state class will represent what a user will see on the screen.

Event is the input data for the BLoC. It can act either as a trigger to start loading data. Or it can represent any actions performed by the user, such as pressing a button, a text input, a page scrolling, and so on.

The “state” class describes such finals as status, fiatCurrency, themeType, and error.

The “state” class describes such finals as status, fiatCurrency, themeType, and error.

class SettingsState {
 final BlocStatus status;
 final String? fiatCurrency;
 final ThemeType? themeType;
 final Object? error;
 const SettingsState(
   this.status, {
enum ThemeType {


  • status can be in a “Loading”, “Loaded” or “Error” state in order to show the loader, the loaded data, or an error message on the screen.
  • fiatCurrency is the currency selected by users from the dialog. The monetary value of the cryptocurrencies is shown according to that parameter.
  • themeType is the enum presented with 2 values: “day” and “night”. Changing this parameter updates the dark/light mode of the app.
  • error implies the data used to show the error message on the screen. Typically, it is merely a string and in case no errors occur, the field remains null.

As the language change with BLoC is covered by the “easy_localization” package, we have not handled it in the current implementation.

The “event” is shown in the picture below.

abstract class SettingsEvent with _$SettingsEvent {
 const SettingsEvent._();
 const factory SettingsEvent.getFiatCurrency() = GetFiatCurrencyEvent;
 const factory SettingsEvent.selectFiatCurrency(String fiatCurrency) =
 const factory SettingsEvent.getTheme() = GetThemeEvent;
 const factory SettingsEvent.selectTheme(ThemeType themeType) = SelectThemeEvent;

The event is built with help of the “freezed” package. There are:

  • getFiatCurrency renders an event to load the currently selected currency.
  • selectFiatCurrency stands for an event that is called when a user selects a particular currency.
  • getTheme indicates an event to load the currently selected theme.
  • selectTheme refers to the event called when a user selects a particular theme.

As soon as the event and state are completed, we continue with the Settings BLoC class implementation as displayed on the screenshot.

class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
 final GetFiatCurrencyUseCase _getFiatCurrencyUseCase;
 final SelectFiatCurrencyUseCase _selectFiatCurrencyUseCase;
 final GetThemeUseCase _getThemeUseCase;
 final SelectThemeUseCase _selectThemeUseCase;

As the project is built with Clean Architecture, BLoC contains four use cases for each action.

 SettingsBloc(this._getFiatCurrencyUseCase, this._selectFiatCurrencyUseCase,
     this._getThemeUseCase, this._selectThemeUseCase)
     : super(
         const SettingsState(
       ) {

The BLoC constructor contains the initialization of the use cases and the initial state. The initial state can work as loading, which is the first state the users encounter, and the event handlers, which are extracted in separate methods.

Future<void> _getFiatCurrency(
   GetFiatCurrencyEvent event,
   Emitter<SettingsState> emit,

 ) async {
   emit(await _getFiatCurrencyUseCase()
         (String fiatCurrency) => SettingsState(

           fiatCurrency: fiatCurrency,

           themeType: state.themeType,



Let’s take a look at the callback triggered on the GetFiatCurrency event. Initially, we emit the loading state to show the loader indicator. Just after the data is loaded, the new state appears. It contains the newly loaded fiat currency as well as the current theme type. To handle the errors, we catch them by means of using the _onError method.

Future<void> _selectFiatCurrency(
   SelectFiatCurrencyEvent event,
   Emitter<SettingsState> emit,
 ) async {
   emit(await _selectFiatCurrencyUseCase(event.fiatCurrency)
         (String fiatCurrency) => SettingsState(
           fiatCurrency: event.fiatCurrency,
           themeType: state.themeType,

Now, let’s explore the callback triggered by the SelectFiatCurrency event. The algorithm is mostly the same as the on “_getFiatCurrency” method. The only difference lies in the fact that the fiat currency on the loaded state is received from the event.

SettingsState _loadingState() => SettingsState(BlocStatus.Loading,
     fiatCurrency: state.fiatCurrency, themeType: state.themeType);
 Future<SettingsState> _onError(Object error) async => SettingsState(
       fiatCurrency: state.fiatCurrency,
       themeType: state.themeType,
       error: error,

_loadingState and _onError methods help to simply create the error and respectively loading states.

The last step is to integrate the SettingsBloc into the app screen. To meet such a purpose, flutter_bloc provides a particular list of widgets.

The default widget is BlocBuilder. However, we use BlocSelector on this screen, since it allows us to focus on particular fields. Thus, if a user updates the fiat currency, there is no reason to rebuild the Day/Night mode switcher.

At first, comes the BLoC initialization.

 final SettingsBloc settingsBloc =;

 void initState() {
   settingsBloc.add(const SettingsEvent.getFiatCurrency());

Before the page is built, we need to add SettingsEvent.getFiatCurrency to load the selected fiat currency. In the project, we use get_it for the BLoC dependency injection, but the more usual way is to use BlocProvider.

Next comes the fiat currency switcher.

   onTap: () async {
     final String? selectedCurrency =
         await showBottomSheetCurrencySelector(
             context: context);
     if (selectedCurrency != null) {
   child: Row(
     children: <Widget>[
       BlocSelector<SettingsBloc, SettingsState, String>(
         bloc: settingsBloc,
         selector: (SettingsState state) =>
             state.fiatCurrency ?? '-',
         builder: (BuildContext context, String fiatCurrency) {
           return Text(
             style: TextStyles.overlay3Bold14,
       SizedBox(width: 4.w),
       const ChevronIcon(),

As soon as a user selects the currency from the bottom sheet, we need to send it to the BLoC wrapped with the SettingEvent.selectFiatCurrency event.

On the selector method, we are able to receive the required data. If the string returned from the selector method changes, everything inside the builder method is rebuilt.

And the final is the Day/Night mode switcher.

 BlocSelector<SettingsBloc, SettingsState, ThemeType?>(
   bloc: settingsBloc,
   selector: (SettingsState state) => state.themeType,
   builder: (BuildContext context, ThemeType? themeType) {
     return GestureDetector(
       onTap: () {
         if (themeType == ThemeType.night) {
               const SettingsEvent.selectTheme(;
         } else {
               const SettingsEvent.selectTheme(ThemeType.night));
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: <Widget>[
             themeType == ThemeType.night
                 ? 'switch_to_day_mode'.tr()
                 : 'switch_to_night_mode'.tr(),
             style: TextStyles.semiBold14
                 .copyWith(color: Theme.of(context).hintColor),
             themeType == ThemeType.night
                 ? CupertinoIcons.sun_max
                 : CupertinoIcons.moon,
             color: Theme.of(context).hintColor,

It works in the same simple way as the fiat currency switcher does. On tap, BLoC updates the state with the new themeType that updates the corresponding text and icon.

The following screenshots demonstrate the UI updates. There come selecting fiat currency and updating the color mode.

The Crypto Aggregator mobile app: “Selecting fiat currency” option.

The Crypto Aggregator mobile app: “Updating the color mode” option.

The Crypto Aggregator project is based on Clean Architecture and the BLoC state management. You can check our GitHub repository, where extra details on the topic have been given out.

Flutter cross-platform has proved to be applicable for crafting mobile apps for meeting various purposes.

You can get more insights on this topic from our articles:
The fundamentals of Flutter & Dart, and Why choose Flutter for mobile app development in 2023?

TBR Group has carried out such software implementations as:
VinciLabs — a platform for providing digital medical solutions for healthcare entities;
SwishBOOM and Babymates are child care mobile apps;
pingNpay will describe the digital payment options based on blockchain technology;
Wywroty Śpiewnik — a musical mobile app — will make you privy to the Polish guitar songs’ performance.

A complete list of the designed mobile apps is presented on our Case Study page.


Operating in the sphere of platform-independent mobile app engineering, TBR Group targets Flutter app development.

Web, iOS, and Android mobile app developers are welcome to get in touch with TBR Group.

Whether you are an experienced engineer, a junior coder, or an enterprise willing to establish your presence online — feel free to contact TBR Group and articulate any concept directly with the development team.

Flutter for building mobile app MVP: is the game
worth the candle?

Annual global mobile app consumer spending in the App Store and Google Play is projected to reach nearly $233 billion by 2026. It is going to hit a 76 percent expenditure increase when compared to 2021.

Offering a diversity of mobile applications, the app stores get to distribute them by category. Within each and every category, there are dozens of apps operating immensely dissimilar at times.

Therefore, a brand-new app should in fact be distinguishing to yield good results and bring something to the table.

Here comes an MVP. Hence, it is actually quite reasonable to get down to work by crafting an MVP version of the emerging product.

Setting up one’s own business does matter too much and could obviously become a real challenge at times.

In practical terms, in order to produce a product of high quality, you will need to make an effort.

An MVP — which stands for a minimal viable product — is a newly created market product that incorporates the minimum of most important features and targets to meet consumers’ needs in all the possibly relevant areas.

In this article, we are going to cover the basics of mobile app MVP creation. And why building an MVP mobile app in Flutter will definitely be a game that is worth the candle.

Why Use Flutter for MVP mobile app development

Chances are you have really heard of Flutter. It is a framework for building cross-platform mobile applications.

You must be familiar with such corporations as:

They did go for the Flutter-based MVPs before having the full version of the product successfully created.

The applications built with this framework can run on mobile, desktop, and web solutions. They are fast, productive, and flexible.

What else can make Flutter for mobile app MVP become a powerful tool for any kind of software programming works?

An open-source code base, inviting all those interested to the Flutter community, might be an attractive reason to think over. So, there are:

Flutter executes Dart. Unlike some other programming languages, Dart appears to be the one quite easily manageable.

Therefore, software specialists will seek a low learning curve in either mastering this language or improving the existing skills.

The article ”The fundamentals of Flutter & Dart” in our blog allows the reader to dive deeper into the domain.

Advantages of creating mobile app MVP with Flutter

Any stakeholder is expected to benefit significantly just from opting for Flutter in mobile app MVP.

You can learn about the tendencies in the mobile software domain in our article “Why choose Flutter for mobile app development in 2023?”.

Building MVP mobile app in Flutter will be suitable for crafting apps in various industries. Including, but not confined to :

  • music and audio;
  • parenting;
  • productivity;
  • artificial intelligence;
  • machine learning;
  • education/teaching;
  • medicine;
  • pet care.

And software engineers are enabled to expedite the MVP app creation due to:

  • the Just In Time compilation and a stateful Hot Reload;
  • a comprehensive set of functionalities combined with Flutter DevTools;
  • Flutter engine;
  • basic widget components;
  • Material design and Cupertino layouts;
  • dispensing with native elements, XML, and “JavaScript bridge”;
  • leveraging the Skia graphic engine;
  • Firebase integration;
  • Ahead Of Time compilation, ensuring the fast and smooth performance of the ready-made application;
  • GPU-accelerated API;
  • easily added software integrations.

Simplifying elaboration, Flutter for MVP allows business owners to:

  • create a sustainable MVP version of the product;
  • freely opt for various niches;
  • precisely allocate the project budget;
  • pick up a dedicated team or an out staff model with no need of hiring standalone Android and Apple teams;
  • add and implement special unique functionality;
  • integrate the 3rd party services and API;
  • EHR or sensitive data storage;
  • save on expenses;
  • reduce time to market period;
  • receive a natively felt, multi-platform and niche adaptive mobile apps;
  • build exclusively user-friendly mobile apps;
  • to bring in more investors.

Judging by the above, business owners and entrepreneurs can significantly maximize the chances of an early MVP delivery.

So by choosing Flutter for MVP development, they get not only a scalable product of high quality, but also push a project to a jump start.

TBR Group — an expert in building MVP mobile apps in Flutter

TBR Group is a Ukrainian Flutter cross-platform mobile app development company.

Having launched a number of projects in the efficient MVP versions, we considered maximizing the user experience by adding extended functionality.

A variety of technological decisions performed by TBR Group may serve as a confirmation of Flutter’s suitability for the MVP version.

Our team has implemented:

  • a verified network feature in the Swishboom mobile app;
  • deep-linking, branded QR codes, and a QR scanner, the blockchain technology in pingNpay;
  • support of various file formats and enhanced web article text extraction in Neural Reader;
  • the VMP version of Śpiewnik Wywroty was completed within 2 months and when the app proved to be a success, our team added new features;
  • an algorithm for scanning and analyzing data from the 3rd party devices was implemented in VinciLabs;

Our Cases page gives a detailed description of the jobs performed. We will look at just a few of them to showcase different niches Flutter is applicable to.


Swishboom is an online spot for providing baby care services.

Swishboom mobile app: “How it works”, “Your Job” and the onboarding “Schedule your babysitters faster” pages.

The users can benefit from an additional range of features as well. Among them, there are:

  • contacts integration;
  • Google map integration;
  • push notifications;
  • promotional offering for AppStore;
  • personal or Swishboom care providers network;
  • posting an upcoming babysitter job offer;
  • claiming a babysitter job;
  • in-app purchases;
  • reviews and ratings.

Neural Reader

Neural Reader Most Natural TTS is a mobile application operating as a Text-To-Speech audio reader, and a Speech-To-Text live transcriber.

Neural Reader mobile app: “My Library”, “Dictation” and “Profile” pages.

The key features available for users are:

  • various types of import files;
  • audio reader and player;
  • audio/text conversion;
  • text transcription;
  • data storage;
  • dictation options;
  • voice selection;
  • language selection;
  • text size modification;
  • audio playback speed.


The pingNpay is a software solution for processing micropayments.

TBR Group used Amplify toolset kit and implemented the GraphQL connection with the AWS services, as well as added the Cognito user authentication.

pingNpay mobile app: “Home”, “Contacts” and “Receive” pages.

In the member area, a user can track down and utilize the following functionality:

  • Amplify Cognito authentication;
  • Amplify AppSync GraphQL communication;
  • branded QR codes;
  • a QR scanner;
  • app deep-linking;
  • push notification integration and handling;
  • encryption and decryption;
  • Native Share for QR codes and links;
  • a QR code on-device saving option.

pingNpay will soon be downloadable from the app stores.


Vinci Labs is a mobile application created for medical organizations.

VinciLabs company is focused on providing a modular API solution to get the 3rd party digital medical devices integrated into particular software products or services.

VinciLabs mobile app – the onboarding “Mission, Vision, Values”, “EHR Data Storage and Analytics” and “Customized Standalone Application” sections.

Vinci Labs is responsible for:

  • the device updates;
  • sensitive data protection;
  • secure storing the EHR data.

All the above confirms that a bunch of technological decisions and functionalities could be implemented with the help of Flutter and Dart bundled together.


Flutter makes its way to truly becoming the best option to build an MVP mobile application due to its low cost, quick time to market, and scalability. It could be the right choice for a start-up as well.

Providing services to business entities of any scale, TBR Group has been mainly focused on Flutter development.

Whatever project size you may have, do not hesitate to contact us for getting it evaluated. We will render any assistance to you with any kind of concern, dilemma, or inquiry.

Top Flutter mobile app examples

Information technology spending on enterprise software worldwide has already been on the rise for a decade. In 2022, the expenditures in the market area were expected to reach $672 billion, arriving at even a higher number of $752 billion by the year 2023.

The Flutter framework, and respectively the Dart programming language, are among the leaders in mobile application development.

Chances are, you might have already posed a question to yourself:
How about creating a project built with Flutter?

  • Is Flutter suitable for a telehealth mobile data processing program?
  • Will an e-commerce or online babysitting application or even cryptocurrency software be run on mobile devices as well as their alternatives on desktop or web solutions?
  • Is Flutter suitable for an online social media application?

In meeting these challenges, Flutter and Dart bundled together have composed an ultimate solution for crafting cross-platform mobile applications.

Flutter app development ensures a platform-independent operation for the entire range of native, web, and desktop software applications.

The Best Flutter projects to copy

With the number of Flutter app examples considerably growing by now, their sophisticated diversity has been impressive.

Among Flutter projects are such giants as Abbey Road Studios, Google Pay, eBay, and Toyota.

Below, just a few of them exemplify the most popular Flutter hybrid apps. They are:


Falling under the category of health and fitness, Reflectly is an AI-powered personal journal app.

By helping users to cope with negative thoughts, the app aims to nourish a positive alignment and discover the science of how to feel comfortable and happy.

Reflectly App Store / Google Play mobile app: “Home screen”, “Progress” and “Amazing! What’s making your evening super awesome?” pages.

By offering users structured audio reflections, Reflectly ensures learning from the world’s major experts in the area. Thus, a user obtains tools as well as a mindset to improve health and state of mind, building the closest way to happiness — a merry spirit.


CryptoGraph is a cryptocurrency market application aiming to provide the user with all the essential data required for a successful crypto market engagement.

CryptoGraph App Store / Google Play mobile app: “Cryptograph”, “Ethereum” and “Feedback” pages.

The user interface is specifically designed for mobile screen resolutions so that all the charts and diagrams could be properly viewed.

The application offers the following features:

  • more than 2,500 cryptocurrencies and tokens available;
  • comprehensive data set on every coin;
  • an exchange rate graph;
  • a list of favored coins;
  • extensive search and filter options;
  • increasing community participation;
  • customizable market cap and display functionalities;
  • a feedback page.


Hookle is a social media assistant app that can be readily procurable by all kinds of businesses.

Hookle App Store / Google Play mobile app: “Statistics”, “Planner” and “New post” pages.

The application comes in with relevant and workable solutions. Respectively, in one single place and one go, the application user can:

  • operate multiple social network channels;
  • release posts, images, and videos to numerous network channels;
  • share content directly from the local drive, virtual disk spaces, or the web;
  • create, preview, finalize and issue publications;
  • customize, edit or delete publications;
  • schedule or hold off any content as well as prospective events;
  • search and pick out the previously used hashtags;
  • receive detailed analytic data on the channels;
  • share the social media channels with all the Hookle users and therefore collaborate.

Over and above, such instruments as Social Score, Hookle Planner, and Unsplash will nicely complement and enhance the previously listed functionality.

Being a time-saving practice, Hookle allows entrepreneurs from anywhere in the world to enlarge commerce opportunities and have their businesses scaled up.


Xdrop is a file transfer mobile application.

The main features the customer benefits from:

  • multi-platform sharing;
  • customer-oriented UI/UX;
  • an advantage of much speedier operation;
  • files, photos, videos, and application exchange;
  • privacy and sensible data protection.

Xdrop App Store / Google Play mobile app: “Profile” “Hey” and “FAQ” pages.

As a Flutter-based mobile application, Xdrop may become a perfect choice to meet the need for data sharing.


Slice is a no-fee Visa credit card mobile application. The main advantage secured by Slice is ensuring reliable and easily accessible online shopping, supported by having an opportunity of splitting the payments.

Slice App Store / Google Play mobile app: “Spark”, “Rewards” and “Spends” pages.

Slice allows users to:

  • shop now and pay later;
  • use passbook to control spending;
  • track and manage expenditures;
  • receive cashback and discounts;
  • funds transferring to the bank or Paytm accounts.

The advantages of using Slice:

  • no user fees;
  • a flexible credit limit;
  • spending habits data analysis.

Providing opportunities to slice the payment submitted, Slice has become a reliable solution for online shopping.


Falling under the category of Food & Drink, Holywings mobile app is focused on reservation services and offers multiple services. They include:

  • an online reservation;
  • a minimum charge fee;
  • online reservation;
  • a delivery option;
  • membership advantages.

Holywings App Store / Google Play mobile app: “Profile” “Event” and “Home” pages.

The application is user-friendly and comfortable to use.

Obviously, Flutter is a powerful tool for any kind of development work. Flutter created apps are fast, reliable, and beautifully designed.

Flutter and Dart mobile app examples vividly illustrate a rapid increase in popularity among these powerful software tools.

TBR Group — your tech partner for mobile app development

The IT Development company — TBR Group — is a group of Ukrainian software engineers specializing in platform-independent software and Flutter and Dart programming tools.

There is a set of cross-platform mobile applications built with Flutter and Dart in the TBR Group’s portfolio. In this piece, we will take a closer look at:

mobile apps.

Vetsie for Vets

Vetsie for Vets is a pet care mobile application built with Flutter and Dart. Vetsie for Vets offers both the pet parent and the vet professional sides for application usage. The admin panel option enables the software administrator to supervise the entire app’s performance and provide any assistance needed.

Vetsie for Vets mobile app: “Book Consultation / Payment” and “Audio Call” pages.

More details on the software development peculiarities you can get in Vetsie case study.

Providing an exceptionally user-friendly interface and a set of functionalities, Vetsie for Vets is essential to ensure a comfortable workflow for each of the takers.


Swishboom — a platform-independent mobile application in the category of parenting and lifestyle.

The application is designed to run in two versions — the first for caregivers and the other for caretakers. Families, experiencing a need for babysitting services, can choose a caregiver whose profile may seem the most applicable for the position. Meanwhile, babysitters and various care providers are able to advertise the caregiving services they offer.

Swishboom enables subscribers to:

  • schedule babysitting services;
  • build a personal network;
  • advertise open positions;
  • send event invitations;
  • post jobs into the calendar;
  • validate, and therefore secure and protect each party involved.

Swishboom App Store / Google Play mobile app: “How it works” and “Find a sister” pages.

Further details of the Swishboom project are presented in the Swishboom case study, which you are most welcome to review.

Wywroty Songbook

Wywroty Songbook is specifically developed by guitarists for guitarists.

Originally designed for musicians in Poland, the app has started gaining popularity offshore.

Wywroty Songbook Apple Store / Google Play mobile app: “Start” and “Popular” pages.

As the largest database of arrangements of Polish and foreign songs, Wywroty Songbook enables its user to:

  • create a collection of your favorite songs;
  • browse the most popular and daily played compositions;
  • transpose the chords into the corresponding keys;
  • switch between the guitar and ukulele chord charts;
  • activate automatic text scrolling;
  • to easily search for pieces of music;
  • activate a night mode feature.

A detailed case study description, as well as a complete functionality set overview, can be checked out at Wywroty Songbook case study.


If you have already got your idea outlined, although a lack of how-to-implement clear understanding is still there, you are most welcome to get in touch with the TBR Group IT Development company.

We will be happy to assist you in clearing up technical aspect details, the look of the application, and the scope of work to be done.

The fundamentals of Flutter & Dart

Smart screens are everywhere. Embedded into the watch on your hand or installed into the mirror in your bathroom or functioning as a roadmap at a bus stop — the screens have already been enriching the life of the entire society.

But multiple functions, as well as convenient usability, are the core features that outline smart mobile phones as leaders in the technological field. The number of smartphone holders is expected to continue growing worldwide.

And here is where Flutter comes in. It strives not just to make sure the power of the device is maintained, but also to enhance its capacity.

Mobile applications, distinguished by functional characteristics, tend to be multi-platform supporting a variety of formats.

As one of the most popular frameworks for mobile app development nowadays, Flutter has steadily gained leadership. As well as Dart — a language it is based on.

Cross-platform mobile frameworks used by developers worldwide 2019-2021

Statista: Cross-platform mobile frameworks used by developers worldwide 2019-2021

Before taking up Flutter mobile app development, you should understand the nature of Flutter and Dart.

Let us dive deeper and discover the topic.

What is Flutter? Is Flutter a framework?

Flutter is a framework for cross-platform mobile app development

In 2018 at the WeAreDevelopers conference in Berlin, Flutter was presented to the IT professional viewership. The speaker, Martin Aguinis, said: “A lot of times when we usually talk about Flutter, we do it with four pillars. Flutter is beautiful, Flutter is fast, Flutter is productive, and Flutter is open”.

The Flutter diagram displayed at the WeAreDevelopers conference

The Flutter diagram displayed at the WeAreDevelopers conference

A brief description of the technology

Flutter is a framework for cross-platform mobile app development

In 2018 at the WeAreDevelopers conference in Berlin, Flutter was presented to the IT professional viewership. The speaker, Martin Aguinis, said: “A lot of times when we usually talk about Flutter, we do it with four pillars. Flutter is beautiful, Flutter is fast, Flutter is productive, and Flutter is open”.

Flutter is a framework for crafting platform-independent applications. And here comes a question: “Is Flutter a programming language?” This issue bothers a great number of curious natures. And the answer will be: “No”.

Flutter itself is not a programming language. It is an SDK – a tool kit – that operates being bundled with either a text editor or an IDE, as a better option, such as Android Studio, IntelliJ IDE. To write the code, Flutter uses the Dart programming language.

The development is started out with the Flutter SDK installation.
Once installed on the chosen desktop operating system, Flutter runs inside the Dart virtual machine.

Respectively, Flutter alongside with Dart allows creating:

  • Android and iOS mobile apps;
  • web applications;
  • graphical applications for desktop Windows, macOS, and Linux solutions.

The benefits primary stakeholders get.

A business owner, by opting for Flutter, can save both on money and time.

So, with Flutter, compared to its native equivalent, it will be easier and considerably cheaper to:

  • build the software;
  • create the MVP;
  • to follow-up with the product support.

Program engineers will appreciate:

  • the documentation, community, and the package repository of the Flutter;
  • an open-source programming;
  • a well-structured toolset;
  • the stateful Hot Reload feature enabled by the JIT compilation;
  • an elegantly designed work environment.

Why will a user enjoy the smooth performance of the application built with Flutter? The answers are:

  • Ahead-of-Time compilation;
  • powerful basic stateful and stateless widgets;
  • Skia graphics engine;
  • out of the box functionalities;
  • no native elements.

Besides, Flutter has also been used to create the user interface of Fuchsia – a new operating system developed by Google.

As described above, no dilemma “Dart vs Flutter” exists any longer, since both terms are interconnected.

Our article “Why choose Flutter for mobile app development in 2024?” helps you much better understand the domain, the benefits, and downsides of the technology.

What is Dart?

Developed by Google and chosen as a programming language for Flutter, Dart is the foundation of this framework.

Embedding an extensive set of basic libraries and packages, Dart:

  • allows using essential elements for daily programming tasks;
  • makes it possible to provide tons of API solutions.

The technology allows Dart to:

  • compile the code into multiple programming languages; 
  • ensure its usage on several platforms.

Given this, Dart is targeting native and web operating devices.

Native solutions

The Dart runtime system is required to execute the code natively. By default, the Dart runtime is included in the Dart VM.

Dart VM is a virtual machine, a collection of components for executing Dart code natively.

To render the machine code, Dart VM applies:
just-in-time compilation (JIT);
ahead-of-time compilation (AOT).

Thus, expediting the start time of the application, the AOT enables an efficient performance of the mobile or desktop application.

Whereas, the JIT is Flutter’s famous Hot Reload feature.

Web solutions

Through the use of particular compilers, Dart is translated into the JavaScript language, which enables its use in the browser. This way web solutions are realized.

Development and Production toolchain for Dart Native and Dart Web solutions

Dart overview diagram: Development and Production toolchain for Dart Native and Dart Web solutions

So, it is incorrect to say: “Flutter coding language” or “Dart SDK”. As Flutter is an SDK or a framework, and Dart – a programming language.

TBR Group: your tech partner in Flutter mobile app development

Just a few words to outline the TBR Group expertise section.

TBR Group is a software company based in Ukraine.

Cooperating with enterprises all over the globe, the TBR Group team has undertaken and successfully carried out a set of projects in platform-independent mobile app software programming.

Vetsie for Vets App Store / Google Play and Swishboom App Store / Google Play may serve as relevant examples.

Vetsie for Vets is a pet care mobile application targeting mainly the USA and Canada market areas. Having been introduced in 2 versions — for the pet parent and the medical workers – Vetsie for Vets perfectly suits both. Outstanding performance has been achieved due to the technology stack of Flutter and Dart realized by the TBR Group team.

Vetsie for vets: “New bookings” and “Upcoming consultation” page. Vetsie for Vets: “Chats” page.

Vetsie for vets: “New bookings” and “Upcoming consultation” page. Vetsie for Vets: “Chats” page.

To learn more on how to craft a pet care mobile app, check “Building a pet care app with Flutter: TBR Group guide”. And to dive into the details of the Vetsie for Vets project realization, you are welcome to read “Vetsie case study page”.

Swishboom App Store / Google Play is another case – a platform-independent mobile app built with the Flutter and the Dart.

Swishboom functions as a web-based spot for parents to order babysitting services. Similar to Vetsie for Vets, according to the functionality assigned, Swishboom has just as well been implemented in 2 software solutions. The first one is specifically designed for families, the other meets the needs of the caregivers and the babysitters engaged in the service.

Swishboom mobile app: “Your job” page and “Find a sister” page.

Swishboom mobile app: “Your job” page and “Find a sister” page.

Find the technical aspects of the project on Swishboom case study.

If you feel like specifying your project requirements, we will be happy to assist.

In a process of dialogue, we will go over the guidelines and terms of the upcoming project, without enforcing solutions. Every peculiarity will be discussed and agreed on with you to ensure an entire case understanding.

You are most welcome to reach out to us and leave your message via our contact form. Looking forward to assisting you at any time.

5 Healthcare mobile applications trends 2024

An extensively digitalized healthcare alongside with COVID-19 consequences has accelerated not just the growth of the mobile device sector alone. The entire healthcare industry is bustling.

Improving the quality of health services, healthcare mobile platforms have gained even more popularity among smartphone holders.

The mHealth apps, which were available in the Google Play Store in December 2021, reached a total of 53,054 items. The Apple App Store showed nearly the same 53,979 applications ready to be downloaded to the customers’ portable devices.

The competition is tough and, therefore, new apps should have a competitive edge to stand out.

In this article, we will give a brief overview of the mobile medical app industry. We will also define the latest trends in healthcare mobile app development.

On top of that, we are going to take a closer look at the Vinci Labs platform – a company that implements medical device integration software.

We will also describe how TBR Group partners up with the Vinci Labs medical device integration software platform.

Top 5 trends in healthcare mobile app development

In the app stores, you are expected to discover a great variety of healthcare applications.

Some mobile medical applications are particularly designed for medical professionals. Others aimed to meet the patients’ needs.

Here come a few examples of the medical workers’ apps:

The patient-oriented apps:

It is required to consider law regulations as well.
An indispensable condition for releasing a healthcare mobile app in the USA, Canada, and across the countries of the European Union is its law regulations observance.

Thus, legal compliance with the HIPAA act, FDA control, and the data protection services CCPA and GDPR should undoubtedly be taken on board.

Concerning the structure of the healthcare mobile platform, two variants of mobile medical applications are usually available. Each contains a bit different set of functionalities.

The admin panel version can be available as well. In this case, the system admin can supervise the working process on the whole and ensure its correct performance.

Which trends are now shaping up the mobile healthcare industry?

#1 Trend – Artificial Intelligence

As an integral part of the entire healthcare system, Artificial intelligence is revamping the way physicians practice medicine.

AI helps doctors:

  • diagnose multiple diseases;
  • define a set of necessary treatment methods;
  • predict better medication results for the patients;
  • much else.

Integrated into the healthcare mobile applications, artificial intelligence technologies facilitate users’ obtaining and managing health-related data.

AI technology offers a scope of valuable opportunities. Such as:

  • symptom checking apps can help users get an initial diagnosis;
  • health checkers help patients decide whether there is a necessity to see a specialist, and if so which doctor to refer to;
  • intelligent chatbots are helpful to answer various patients’ queries;
  • AI app programmes can assist in receiving valuable health data to be further properly stored, etc.

BasicAI is a data collection AI and ML mobile application.

BasicAI mobile app – “Submit task” and “Task detail application” pages.

BasicAI mobile app – “Submit task” and “Task detail application” pages.

#2 Trend – Virtual reality

Both augmented reality and virtual reality are considered to deliver real-life experiences.

In the healthcare area, they assist in teaching a trainee on getting through different medical tasks having no actual human body around.

The technology proves to be indispensable in tackling various pains, especially while laboring. It can also be used by stroke victims to efficiently regain their mobility.

The VR and AR technologies can be implemented in a variety of applications for mobile phones. This allows to investigate and examine new options when socializing with users.

Complete Anatomy mobile application 2024 App Store / Google Play is a complete anatomy reference book with creative tools including virtual dissection.

Complete Anatomy app – “Groundbreaking Female Model” and “Simulate Cadaveric Dissection” pages.

Complete Anatomy app – “Groundbreaking Female Model” and “Simulate Cadaveric Dissection” pages.

#3 Trend – Telemedicine

Telemedicine turned out to be a much-needed tool, gaining popularity as an ultimate option used by both patients and doctors.

Telemedicine apps have boosted sharing the online data between them.

Addressing common health issues, patients can be advised by doctors and medically prescribed out of a clinic. It ensures immediate contactless attention.

This tool saves a ton of a patient’s time, while doctors can keep to the daily routine much more efficiently.

Seeking a professional consultation, healthcare experts and specialists can be reached at any time.

Telemedicine apps have come into widespread use, providing easy access for doctors of different specialities.

AMBOSS App Store / Google Play app is an AI knowledge base. The application allows users to get answers to various medical inquiries and perform prior diagnostics.

AMBOSS mobile app – “Master every speciality” and “Explore content seamlessly” pages.

AMBOSS mobile app – “Master every speciality” and “Explore content seamlessly” pages.

#4 Trend – Blockchain

Blockchain in healthcare has drastically moved forward in the area.

Following this tendency, applications have proved to be more secured, with online transactions becoming much quicker and safer.

This is likely to advance medical bill online payments, eliminating a physical queueing up.

A chance to pay online will facilitate the payment process and provide more security to it.

Blockchain technology will reduce unsolicited use of patients’ data kept in the application.

Exchange and storage of the medical data are readily available.

Accompanied by the possibility to make records, Blockchain technology helps to diminish blunders, forgery, stealing and losing the data.

Through Blockchain solutions, an extra tool has emerged to efficiently cope with healthcare problems, covering clinical trials, drug control, and keeping medical records.

Reply gives data concerning blockchain technology in healthcare mobile applications.

Reply project – “Healthcare Blockchain Applications” and “Blockchain Applications” sections.

Reply project – “Healthcare Blockchain Applications” and “Blockchain Applications” sections.

#5 Trend – Integration with 3rd party devices

Third-party device and software integration means an extension of a device’s functionality by means of analyzing, processing, and storing the data with the help of existing software.

Through an application programming interface (API), the existing 3rd party device can be integrated into the software in question.

Any type of device can be connected to the software to obtain and process new data, automating the delivery and saving operational time.

These include, but not limited to pulse oximeter, weighing scale, digital stethoscope, portable ECG, spirometer, and B.P. monitor.

The above-mentioned devices are updated and patients’ EHR data is secured and stored, which is advantageous for both a patient and a doctor.

Hence, the users’ and clients’ demands define the trends and main tech and non-tech requirements for mobile apps.

Apple Watch app makes it possible to pair and sync a personal Apple Watch with the iPhone.

Apple Watch mobile app – “All watches” and “Add Watch Face” sections.

Apple Watch mobile app – “All watches” and “Add Watch Face” sections.

The Vinci Labs platform

Vinci Labs is a community of medical doctors, business people, and software engineers.

Vinci Labs company is focused on providing the API solution to get the 3rd party digital medical devices integrated into the standalone software product or service.

Vinci Labs offers users to choose either between the API’s option or go for an application variant.

Ensuring the correct performance of the medical device integration software, Vinci Labs handles the whole integration process. So, Vinci Labs:

  • carries out the device updates;
  • protects sensitive information;
  • makes sure EHR data is stored highly secured.

The key features the Vinci Labs Platform offers:

  • Native 3rd Party Device Integration;
  • Modular API;
  • Customized Standalone Application;
  • EHR Data Storage and Analytics.
Vinci Labs platform – “Modular API’s” and “Native 3rd Party Device Integration” sections.

Vinci Labs platform – “Modular API’s” and “Native 3rd Party Device Integration” sections.

Vinci Labs platform – “EHR Data Storage and Analytics” and “Customized Standalone Application” sections.

Vinci Labs platform – “EHR Data Storage and Analytics” and “Customized Standalone Application” sections.

By applying the above, the Vinci Labs platform makes it possible for healthcare organizations to ensure quality and seamless digital care accessible to their patients and customers through the use of technology.

Vinci Labs platform – “Enable Your Platform For Real Time Virtual Care” and “Perform Remote Patient Monitoring and Homecare” sections.

Vinci Labs platform – “Enable Your Platform For Real Time Virtual Care” and “Perform Remote Patient Monitoring and Homecare” sections.

Currently, Vinci Labs is on its MVP stage, getting through a steady development process.

While the front-end was entirely accomplished by TBR Group, a third-party technical partner worked on the backend programming part.

Given this, on the backend, it was decided to implement an algorithm for scanning and analyzing data from the 3rd party devices.

The algorithm in question contributed to the subsequent creating of charts, diagrams, and other data storage modules.

Consequently, the implemented options referred to measuring the user’s temperature, blood pressure and pulse, as well as other health indicators.

Vinci Labs makes it possible to obtain a platform demo version.

The challenge & solution

The main goal of the project was to keep detailed statistics of the patient’s health indicators during treatment and provide an easy way for patients to enter medical data.
We have developed a mobile application that allows patients to enter data from devices without thinking about the meaning of certain indicators, since data can be uploaded simply by taking a photo of the device. Also application provides a way to interact with health indicators statistics by interactive charts. Charts support data scaling and different date ranges.
One of the challenges we faced while developing is to show on the charts measurements that was made outside healthy range. To achieve this, we added a custom coloring for line chart which depends on measurements data and health indicators ranges.


Actively expanding, the mobile healthcare industry has definitely established its presence in the market niche.

Hot trends like AI, telemedicine, and 3rd party device integration are outlining the basic technical requirements for a brand new mobile app to be delivered.

Respectively, mHealth has influenced the efficiency, communication options, costs, and even quality of healthcare services.

TBR Group IT Development company has already obtained vast experience in building complicated medical apps.

Solving technical challenges, TBR Group works out a general, step-by-step procedure to craft your unique healthcare or medical mobile app.

Depending on the technical specifications, our software engineers team tracks down and utilizes various frameworks and tools, as well as programming languages to efficiently carry out the project.

We make sure, that at each design stage, the communication between our development team and the client company remains stable and as if led nominally.

Feel free to contact us at any convenient time. Through get In touch form, you are most welcome to share your mobile app concept. And indeed, there is always a perfect way to start.

Pros and cons of dedicated teams for mobile app development

A rapid and continuous growth of the IT realm can hardly stay unnoticed. Serious changes are underway in the programming field. And mobile application development is in the spotlight.

The Number of mobile app downloads worldwide from 2016 to 2021 showed a steady increase in downloads. Thus, in 2016 this number surpassed the mark of 140 billion, having reached the volume of 230 billion in 2021.

Furthermore, mobile applications are expected to generate more than $613 billion in revenues by 2025.

Given this, owning a mobile application to expand the business is one of the latest trends.

So, how to craft a first-rate mobile app?

The mobile application development appears to be rather expensive and time-consuming.

Getting just the right team to fulfil the dedicated project is crucial. Is it better to hire freelancers or refer to a development company?

The software service providers may offer reasonable solutions. Respectively, business holders do tend to opt for external help.

There are a few types of outsourcing in mobile application development.

In this article, we will discover the advantages as well as the downsides of the dedicated team approach and the outstaffing model.
We will also outline our expertise this business model cooperation.

The anatomy of dedicated development and outstaffing model

What is a dedicated team model?

A dedicated development team – a group of specialists in the software field working together on a particular project.

The initial scope of work may vary depending on the case and the client’s requirements.

The services provided by the dedicated team mainly lie in crafting designs, software development and QA testing.

The outcome is an entirely completed, ready-to-market product. It can be either a mobile app, or a website payment system.

The concept implies business cooperation at least between a client company and a service provider.

The scope of work, project features and values, desirable specifications, and timelines will form the cost of the dedicated project and identify a suitable payment model.

In charge of the group is a project manager. Leading the dedicated software team and coordinating the workflow, the PM supervises the whole development process.

Still, a dedicated team should not be considered as a unit of the in-house staff structure. While working remotely on the client’s project, the team is directly subordinated to the own supervising management.

Hiring a dedicated software team allows the business holder not to perform a direct hands-on administration and therefore lessens the management burden.

What is outstaffing?

The outstaffing business model can be characterized as a personnel withdrawal.

As the majority of the business holders are truly tech-savvy, they can successfully head up the entire development process.

In case of a staff shortage, outstaffing can appear like a perfect choice to swiftly and relatively easily fill the temporary skill gaps.

So, applying for an outstaffing model helps to optimize expenditures on human resources.
Typically, two or three sides of participation are involved in outstaffing. There are:

  • the host/customer company;
  • the recruitment agency or the intermediary;
  • the service provider/outstaffer.

The client company is a corporation in need of temporary staff resources to carry out a definite scope of work or to participate in the development project.

The same as in the dedicated team module, a recruitment agency is also not a constant participator in the outstaffing business concept. If any, the agency acts as an intermediary between the host company and the outstaffer.

After the project requirements have been defined, the service provider can start outstaffing suitable candidates.

Scrupulously selected, each specialist has to perfectly fit the client’s requirements.

Performing as a part of the in-house team, the allocated employee is still registered as a staff member of the provider company.

Being in charge of the entire development process, the host company controls the employee’s engagement, as well as every stage of the project implementation.

Advantages of the dedicated team and outstaffing models

These models can actually appear as a perfect solution for mobile app development.

As the allocated staff work distantly, it helps to reduce costs on maintenance and taxes of different kinds.

So, saving expenses, they just as well expedite time to market period and lessen the management burden for the client company.

What concept to opt for depends on the project requirements and its goals. It is necessary to estimate the costs and the budget available. The characteristics of the market will also have to be examined.

The difference between these two models lies mainly in their objectives.

The outstaffing model implies allocating one or more specialists to the host company. Usually, there are no time frames for such cooperation.
The host company provides direct supervision over the outstaffed employees. Specifying tasks, the customer company controls the whole working flow.

The dedicated team concept requires a team of specialists to fulfil a particular project within a set timeline. The entire development process is controlled by the project manager of the dedicated team.

In the end, the client company receives a completely ready-to-market product.

Here comes a comparative table summing up the advantages and some downsides of these business models.

Pros and cons of dedicated teams and outstaffing

Advantages and disadvantages of dedicated team and outstaffing models

Outstaffing model by TBR Group: the babymates case

TBR Group – a Ukrainian IT development company specializing mainly in cross-platform mobile app development.

The technology used – the Flutter framework and the Dart programming language.
The piece on Why choose Flutter for mobile app development in 2023? will let you have a closer look at these advanced technologies.

You are welcome to observe a few products crafted by our team. These mobile applications are already available in the App Store and Google Play. So, out there, you can find Vetsie for Vets (App Store / Google Play), Swishboom, Neural Reader Most Natural TTS, Śpiewnik Wywroty.

In some mobile software implementations, TBR Group had a chance to operate as a dedicated team, as well as an outstaffing company.

In the babymates project, TBR Group performed as an outstaffing company.

This mobile application has been specially designed for dads to ”dad” in the most comfortable, pleasant and happy way.

Paying attention to how tough being a dad can be in the new world of restrictions, lockdowns and social distance, babymates aims to digitally connect dads with the service created.
The key features include:

  • user authorization;
  • profile section;
  • online chat;
  • map integration;
  • community;
  • events;
  • contact form;
  • and a dad joke generator section.

Built up with a rich set of functionalities, babymates is intuitive and really user-friendly.

The babymates mobile app – build your dad profile and connect with your dad mates pages.

The babymates mobile app – chat with new mates and feed, create and share dad moments pages.

The challenge and the solution

The engineers of TBR Group took part in the babymates mobile application development. Enlarging the host company’s team, the group considerably expedited the development process.


The goals set had been reached and the assignments fulfilled. The babymates mobile application was delivered to the client within the defined timeline.


Being popular among users, mobile applications have truly become a core feature in expanding business online.

As a business owner, to craft a mobile app, you have to think over tons of possibilities and define hundreds of variables.

TBR Group dives into the nitty-gritty of your business idea.

Perhaps, you would like to opt for a dedicated development team. Or you might choose an outstaffing model.

In any case, the TBR Group IT Development company will gladly help you decide what suits you best and give you a helping hand.

You are most welcome to contact us via the get In touch contact form. At all times, we are always here to assist you.

Top 9 features of mobile pet care apps — Flutter app development company

The pet industry market, having grown over the past few years, has actually created new exciting opportunities for nearly all the market participants.

The American Pet Product Association (APPA) in Pet Industry Market Size, Trends & Ownership Statistics have figured out a continuous growth of the total U.S. pet industry expenditures. The records show a corresponding increase in outlays from $90.5 billion in 2018 up to $103.6 in 2020, with the estimated figure of $109.6 in 2021. The report has confirmed a consistent increase in the pet annual expenses year-on-year.

The COVID-19 conditions have also contributed to the pet industry development, having pushed hundreds of vet industries to build businesses online.

Respectively, the sector of mobile pet care applications is rapidly moving forward.

Providing a range of various services, apps for pet care have already simplified the way the pet parents get in touch with their vet care professionals.

The diversity of the modern software capabilities has resulted in technological stack dilemma. What programming language to choose to create the best app for dog care? Or what functionalities distinguish good pet apps from the mediocre ones?

An optimal way to get stared avoiding possible pitfalls is to craft an MVP version of the application. This pilot option enables business owners to watch over the strong points and detect the downsides.

In this article, we will go through a list of the top must-have features which every vet mobile app should capture in its MVP release.

9 features the best veterinary mobile app should have

It’s worth mentioning that a vet care app really implies two sides of interaction – a pet parent and a veterinary clinic. So, you will need to develop two types of applications as well. Each app has to hold a bit of a different set of functionalities.
Here come 9 must-have features for the MVP solution. They are:

Admin panel for owners

To efficiently maintain the interaction process between the clinic itself and pet parents, the administrative panel appears as an absolutely essential feature.

It allows vet professionals to handle all the incoming requests, text or video messages, as well as various notifications.

In the admin dashboard, veterinarian staff observe new bookings and manage actual appointments.

Plus, as all the details regarding a pet and its owner are documented in one place, it couldn’t be more convenient for pet care providers.

Onboarding / authorization options

To obtain services, the consumer needs to create a personal account and to authorize as a user. Embedding a log-in option may also encourage members to keep up using the service.

Pet’s profile

The pet profile section displays the general information about a pet. A pet parent can disclose a pet’s character, behavior and nutrition habits.

The general data, such as the breed, color, age, and weight should similarly be defined in this section.

The vet professional can insert and update information concerning a pet’s possible ailments and its health situation.

Coming in really handy, this option definitely allows the pet parent to be terribly bitty about the pet’s background.

Payments and Order history

Having a few plans available for the subscription, the pet owners can freely opt for that one, which is the most appealing.

It is possible to set up a monthly payment or an annual subscription. The consumer can just as well go for a flat fee.

The vet clinic usually determines the payment terms and methods by taking into account the veterinarian staff qualification, the type of the consultation services and the subscription period.

Book a consultation

This feature enables the pet parents to choose a vet doctor and set up a convenient time and date for a visit.

The consumer can also refer to the preferred veterinarian in text or email messages on simple questions.

An appointment can be held either in person or via a video or audio call.

Video and Audio calls

Carrying out a video or audio call with a vet doctor can appear most important in case of possible symptom onsets or injuries a pet may have.

A pet parents can schedule either a video and audio conversation with vet specialists, or pay a personal visit.

Online Chat

An online chat feature enables pet parents to directly get connected with pet care providers.

The required data concerning a pet’s variable medical conditions can be sent to a veterinarian in a text, voice, or video message.

Google map integration

A pet’s parents can look for a veterinarian clinic nearby. The search results will be displayed on the map in the most convenient way.

The so-called heat map index, the option of displaying the current workload on every vet station, can obviously come out as a nice little bonus.

Pet’s health records

This section contains all the official medical data on a pet’s chronic conditions, vaccines received, and allergies diagnosed.

Here a pet’s parents and the vet staff can check a pet’s health records or get a summary of the previously paid visits.

The application designed for vet service providers may include extra functionalities. Such as:

  • order management
  • earnings
  • daily reports
  • active/inactive user status
  • heat maps index.

Nice to have mobile app features and extra functionalities to implement throughout the next stages of the product evolution may include:

  • reminders
  • push notifications
  • educational articles and videos
  • PDF reports
  • Facebook events
  • food monitoring
  • exercise
  • reviews and ratings
  • support
  • GPS tracking
  • first aid.

Respectively, these handy features will enable both the business owner and the pet parents to interact with each other in an efficient and cost-effective way.

The aforementioned core set of functionalities has also been implemented in the following vet applications:

11Pets App Store and Google Play, PetCoach App Store and Google Play, Rover App Store and Google Play, PetDesk and Vetsie for Vets App Store and Google Play.
Hereinafter, we will get a closer look at Vetsie for Vets pet health app.

Vetsie mobile pet services app developed by TBR Group

Vetsie for Vets – a veterinary telemedicine mobile application, available in App Store and Google Play. Crafted by the Ukrainian IT development company – TBR Group – Vetsie for Vets is mainly oriented to the Canadian market.

You are most welcome to read our article Building a pet care app with Flutter: TBR Group guide. The entry describes the development stages performed and may give you a hint on how to craft the best pet care app.

And to get more technical overview of the implementation, please, refer to Vetsie case study page.

So, realized in 2 versions, Vetsie for Vets (App Store / Google Play) offers an expedient set of functionalities to the pet parents and a practical admin panel for the vet clinic.

Opportunities for users and administrators offered by Vetsie for Vets and the key features of the application

Vetsie for Vets is a user-friendly environment for any consumer. The key features of this pet services’ app are the following:

  • Video and audio calls;
  • Chat (file uploading, unread messages, voice messages);
  • Book consultation;
  • Google map integration;
  • Charts;
  • Reviews;
  • PDF reports;
  • Push notifications;
  • Stripe payment integration;
  • Facebook events.

The functional capabilities offered by Vetsie for Vets (App Store / Google Play) make it easy for the pet owners to connect with a pet care expert.

Vetsie for Vets mobile app - Text / Audio Call feature.

Vetsie for Vets mobile app – Text / Audio Call feature.

Plus, thanks to the push notifications, the pet parent receives all the vital data concerning the pet care services.

Being able to schedule a visit or immediately speak to the doctor in times of emergency, the user obtains a highly qualified consultation and thus a sense of security.

Vetsie for Vets mobile app – Book Consultation feature.

Vetsie for Vets mobile app – Book Consultation feature.

The administrative section provides vet business owners and the medical staff with an attractable Admin Dashboard.

It displays general statistical data, earnings obtained, appointments scheduled and the flow of the incoming requests.

The app keeps all the metrics together, tracking a pet’s medical history in one convenient place and at the tip of the fingers.

Best of all, the communication is held right through the application, simplifying the pet’s health care involvement.

Technological Stack

Vetsie for Vets (App Store / Google Play) – a veterinary mobile application that is cross-platform and cloud-based.

To obtain the most relevant software realization of the project, TBR Group used the Flutter framework and the Dart programming language.

Being relatively brand new, Flutter has already evolved into one of the most widespread programming languages.

Wonder why? You are welcome to check our article on Why choose Flutter for mobile app development in 2023? You will find out the reason for Flutter’s growing popularity among developers. As well as why consumers themselves love applications build with Flutter.

To enable video and audio broadcasting options, TBR Group implemented a robust Agora SDK technology. Respectively, Agora Real-time Communication (RTC), Agora Real-time Messaging (RTM) and Agora Web SDK library have been integrated.

Just as Agora SDK itself does not support chat features for Flutter web options, our team had to use a Flutter web plugin combined with the JavaScript language.

This way, TBR Group have succeeded to craft a highly productive pet health mobile app, with a reliable and secure interaction between the vet business owners and the pet parents on one single platform.


Having successfully crafted multiple cross-platform mobile applications, the TBR Group IT Development company each and every time takes care to deliver a top-quality software product.

Check our projects as a proof. You can find and download the apps, such as Swishboom, Neural Reader Most Natural TTS, Śpiewnik Wywroty from the App Store and Google Play.

You are most welcome to ask anything you want at any time right through our Get In Touch contact form. We will always be happy to assist in your project realization.