Flutter Vs React Native for Mobile App Development

    In this competing world, the ultimate goal of a mobile app development company is to select a cross-platform framework that should assist developers to write a single codebase.

    And arrange it across multiple platforms, sharing as much code and thus, time and money as possible. In that way, we can provide help to our customers in picking the right framework that might best support them to attain their goals.

    Flutter and React Native are two of the most popular frameworks that received widespread compliments for their capabilities in building powerful native-looking apps. Whether you should go for a React Native or Flutter App Development Company in India, for your next app project, needs careful consideration of several aspects.

    Irrespective of their mutual opposition and competition, it is extremely important to estimate their strengths and weaknesses, pros and cons, and particular features that app developers may find let us discuss by introducing each framework and its key attributes.


    It comes as a robust and comprehensive software development kit furnished with UI widgets and tools., Futter offers a better value proposition as you need to rely less on third-party tools and APIs When it comes to the cost of app development. Flutter is considered to be one of the leading cross-platform frameworks used for developing powerful and natively compiled apps. And this can run simultaneously on iOS, Android, web, and desktop.

    Pros of Flutter

    •Its reloading feature instantly reflects changes in app code while the app is still running.
    •It comes with rich UI widgets to help developers keep an eye on design guidelines and the latest design principles of both iOS and Android platforms.
    •Flutter code comforts easy integration with Java for the Android platform and Swift for the iOS platform Known for fast-paced iteration cycles to save development time by limiting the testing needs to just one codebase.
    •Allows easy and fast sharing of code across many platforms, making Flutter perfect for MVP app development

    Cons of Flutter

    • Flutter can offer a fairly strong range of libraries and tools, though in comparison, far less than React Native.
    • Doesn’t offer compatibility for evolving platforms such as watches, Android Auto, and a few others
    • Needs to depend on standard releases and cannot prefer instant updates and patches for apps.

    React Native

    React Native is a JavaScript-based open-source mobile app development framework that is used far and wide for cross-platform mobile and native mobile app projects. The key positive attributes of React Native are optimum code reusability, fast-paced development, robust tools, and plugins.

    Pros of React Native

    • Permits natively rendering of the APIs without involving HTML despite creating authentic UI, confirms best app performance.
    • Comes with a full-bodied ecosystem of UI libraries to confirm smooth re-rendering of the app look and feel as per the objective platform
    • Comes loaded with a rich set of correcting and error reporting tools.
    • Offers hot reloading topographies to help add codes directly into a new app while without interfering with the running app state.

    Cons of React Native

    • The native version of APIs in React Native projects may not offer far-reaching support to some native UI elements
    • React Native developments often do not support many third-party collections for smooth operation.
    • Doesn’t offer support for parallel edge through and multi-processing, causing a little slower performance for some apps
    • The restoring tool, Chrome debugger, is not suitable for several developers for editing, code inspecting, etc.

    Evaluating Flutter Vs React Native Across Key Criteria

    Programming Language

    Flutter uses the object-oriented and very expressive Dart programming language and can permit more expressive coding. React Native uses JavaScript which is known for energetic coding. Since React Native enjoys more popularity than Flutter among developers as JavaScript has been in the development world for a longer period.


    Flutter offers all the UI constituents out of the box and doesn’t need a bridge for connecting with the native UI layer. Flutter incorporates platform-specific Cupertino and Material Design UI elements by using the Skia engine. This confirms optimum stability for Flutter apps.

    React Native needs to use the JavaScript bridge to form communication with native UI modules. Best app development company in India helps communication with the Native UI from side to side JSON messages and uses the Flux architecture created by Facebook.

    Installation & Setup

    Flutter installation is a bit more complex and time-consuming. The platform definite binary needs downloading. Though you don’t need any awareness of JavaScript, the process takes a lot of steps. Flutter offers a detailed installation guide on the positive side. Flutter also provides a CLI tool called Flutter doctor to help smooth installation.

    CLI also allows easy installation without any prior JavaScript knowledge. It offers React Native CLI that needs worldwide installation React Native doesn’t offer any installation guide to the developers in the contrast to flutter.

    UI components and API

    When it comes to UI improvement, Flutter has an edge. It offers a robust source of API tools and a lot of ready-to-use User Interface constituents. Flutter also offers UI rendering widgets for both Android and iOS on top of all these. Despite connecting the Native settings of Android and iOS through the JS bridge, React Native depends too much on the third-party libraries. React Native components, on the other hand, behave inconsistently through different platforms. 

    Community Support

    Flutter is gradually becoming popular, it also has the fastest-growing community. Since React Native has been around for an extensive-time period, it boasts of a bigger global community making continuous value trimmings. It is loved by App Development Company in India for an unlimited majority of mobile app developers and enjoys better community support than any other important JavaScript framework.

    QA Testing

    Flutter offers a broad collection of testing features. The greatest thing is, each of the Flutter testing features comes with proper certification and out-of-the-box support. Flutter also offers a widget testing feature to enable unit testing for inspection UIs.

    However JavaScript comes with a few unit testing features, the React Native framework wants complete support for UI testing or integration testing. For testing, React Native typically hangs on third-party testing tools. It also does not agree on any official testing support.

    Flutter vs React Native: What kind of app projects are appropriate for which framework?

    As of now, we have known that both frameworks have their strengths and weaknesses for definite app projects. Flutter is typically favored for app projects with more attention on user interface and limited feature set.

    For distinctive, limited budget app projects that requirement to ensure consistent UI across the web and mobile platforms, you will find that Flutter is the more ultimate framework. React Native is the perfect framework for developers competent with JavaScript coding skills. Complex and demanding app features can always be well-shaped with React Native.

    The ‘getting started guide’ of React Native for mobile app development assumes that users downloading the framework would have already been done with the essential setup needed for developing Android and iOS apps. The guide doesn’t give an idea about the fundamentals but directly increases to the formation of a new project. The data about Xcode, setting up a guide for Android developments is all missing.  

    Flutter challenges entirely here. It gives a whole explanation of the setup as well as the platform for the two projecting operating systems – Android and iOS. An inbuilt tool called the ‘Flutter Doctor’ guides during the setup. And above all, the guide says about all the trappings in the platform and which to use for formation. Hence, records and the CLI support for setting up and configuration help begin the upper hold of Flutter over React Native.

    Technical Structure

    Technically, React Native architecture hugely hang on the JavaScript runtime situation or the JavaScript Bridge. It suggests that the framework uses JavaScript for communication with the native code, and all the native constituents are not innate in the framework itself. 

    Flutter has a greater edge here. App Development Company in India makes use of the Dart Framework

    Though somewhat bigger, the framework includes almost all native components in it and, thus, doesn’t need bridges. This non – necessity of bridges is one of the greatest advantages for Flutter, donating to its speedy performance than the React Native framework. Thus, Flutter is more durable, and sound technically than React Native for the development of the mobile app.

    Development Time 

    React Native

    Coding with React Native is no uncertainty faster thanks to several third-party collections which optimize the design process. Plus, convention libraries speed up the development. Surely, it all depends on some factors, such as the developer’s expertise, as well as app scalability and functionality.

    Here are the examples of third-party libraries that may be found here:

    1. React Native Gesture Handler
    2. Native Material UI
    3. Base React
    4. Anxious
    5. React Native Maps 


    You have to add separate code files for different OS platforms for building complex UI elements. Start working with Flutter after loading and expanding the full package. To get more libraries use the pub. Dev.

    Form, test, and arrange your mobile app automatically with such servers as Bitrise and CircleCI. And in case you face some problems, refer to the Flutter community, helping each other to code quicker and easier.

    Testing: Make Sure Your Code Works Well

    Let’s single out the following four classes of UI testing:

    1. Unit testing tests for each function.
    2. Functional testing which refers to a definite function, class, or method;
    3.  Integration testing 
    4. Acceptance testing 

    React Native

    You can use Performance Monitor to get started from the debug menu for instance, for windows. It’ll be exposed in your app over the unlocked screen. You may use Appium for testing iOS apps on reach native.


     Testing in Flutter is automatic and split into Unit-, Widget-, and Integration tests. Let us see how to proceed?

    1. It makes an independent test unit; 
    2. Try to make a single test.
    3. Run the full test suite.

    Plus, while testing the Flutter app, you will need two distinct libraries for dart tests and flutter tests. It means you can’t run the tests from the submodules from your combined development environment, like Eclipse, Intellij Idea of Android Studio.



     Linter for Dart is a package that deserves close care as a hand-picked and community-driven gathering for the creation of clean code. We will also advise Analyzer for embedding, as it delivers a rich library that does static analysis of dart code. Plus, you may continue with the utmost well-known ones:

    Some other debugging tools for Flutter are here.

    React Native 

    First of all, you have to define the two types of bugs, development errors, and production errors. So you don’t try to fix everything in bulk, use breakpoints. You have to choose the Best App Development Company in India to know the better use of their react native and flutter features. React-native-debugger is the first tool that comes to our mind if talking about correcting stuff for react-native.

    • Reaction, — To inspecting and debugging macOS, Windows, and Linux apps
    • Flipper, very humble and clear mobile application debugger with a log viewer
    • Numerous other important tools for troubleshooting may be found in the official documentation by Expo.

    Code Structure  

    React Native

    React Native code structure, styling is a lot direct with JavaScript that permits forming MVC just from scratch. RN has an in-built architecture that is compared to react. Expo is a free tool is simplest way is to use Expo or React Native CLI that allows you to develop and deploy RN applications with native code writing. 


    Through the main Dart, the file is a great start with flutter. This file is extremely important because it will perform the code for iOS and Android. The widget actuality run by the run app function must be a Stateless Widget, and the widget itself ought to be as simple as MaterialApp, CupertinoApp.


    This blog speaks about the complete comparison between React Native and Flutter without being biased. The motive is to help developers to pick the appropriate programming language between Flutter vs React Native in 2021 that best suits their needs and skills. Even though Flutter is a powerful competitor to React Native, at some points both overtake each other in specific fields. Depending on your business necessities, you might want to select the best app Development Company in India or react native app Development Company. Hopefully, this blog will be more beneficial according to your search. 

    About author
    RanjitPal Singh
    Ranjitpal Singh is the CEO and founder of RichestSoft, an interactive mobile and web Development Company. He is a technology geek, constantly willing to learn about and convey his perspectives on cutting-edge technological solutions. He is here assisting entrepreneurs and existing businesses in optimizing their standard operating procedures through user-friendly and profitable mobile applications. He has excellent expertise in decision-making and problem-solving because of his professional experience of more than ten years in the IT industry.

    We build digital products that help you unlock opportunities and embrace innovation.

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