Flutter is an open source framework to create high quality, high performance mobile applications across mobile operating systems – Android and iOS. It provides a simple, powerful, efficient and easy to understand the SDK to write mobile applications in Google’s own language, Dart.

In general, developing a mobile application is a complex and challenging task. There are many frameworks available to develop a mobile application. Android provides a native framework based on Java language and iOS provides a native framework based on Objective-C / Swift language.

However, to develop an application supporting both the OSs, we need to code in two different languages using two different frameworks. To help overcome this complexity, there exists mobile frameworks supporting both OS.

These frameworks range from simple HTML based hybrid mobile application framework (which uses HTML for User Interface and JavaScript for application logic) to complex language specific framework (which do the heavy lifting of converting code to native code). Irrespective of their simplicity or complexity, these frameworks always have many disadvantages, one of the main drawback being their slow performance.

In this scenario, Flutter – a simple and high performance framework based on Dart language, provides high performance by rendering the UI directly in the operating system’s canvas rather than through native framework.

Flutter also offers many ready to use widgets (UI) to create a modern application. These widgets are optimized for mobile environment and designing the application using widgets is as simple as designing HTML.

Here given some features of flutter:

Cross-Platform Development
Cross Platform Development saves time, energy and money. With Flutter, you need to write the code once, maintain and can use that for two apps. The need has gone from developing a different code for a different platform.

Hot Reload
Conventionally, mobile developers had to wait a few minutes for a change to the code to reflect on their screen. But, with Flutter app development, there is a feature called Hot Reload which allows developers to render changes in sub-seconds. In the long haul, it saves time, money and efforts – everything.

While applying change, the Dart Virtual Machine also makes a widget tree thus only the code that has the relevance with the change will be affected while the current state of the application will be preserved in the virtual server. So, developers can view the effect of the change without the fear of the change affecting any of the emulators, simulators, and hardware.

Minimal Code
Flutter is developed using the Dart programming language. Dart uses JIT and AOT compilation that helps improve the overall startup time, functioning and accelerates the performance. JIT enhances the development system with the hot reload function. It refreshes the UI without putting in the effort to building a new one.

Accessible Native Features and SDKs
Your app development process gets easy and delightful through Flutter’s native codes, third-party integrations, and platform APIs. Therefore, you can easily access the native features and SDKs on both Android and iOS platforms and reuse the widely-used programming languages such as Kotlin and Swift.

Widgets
When a developer works on the Flutter app development framework, the reason why they can build applications faster is because of its impeccable ready to use widget collection. Along with a huge collection of widgets, it also has animations that can be selected to make your application interactive and effective. You can select widgets based on the platform, nature of the applications as well as the geographical locations where the application will be deployed.

Also, the widgets entered in the Flutter’s Library are not some random additions, they are standardised based on the preferences of the users and thus it not only gives you the pace in mobile app development, but it also helps in making your application, more acceptable for your target audience.

Native Feel and Features
Flutter enables you to use your existing code Java, Obj-C and Swift to gain the key to native features which are platform specific. Camera and Geolocation are features connected with the use of native languages and offers you the convenience of working in the native language, and it provides access to the native features of both iOS and Android platforms.

Pros and Cons of Flutter

Pros:

  • Developers need to write just a single code base for both applications (both Android and iOS platforms). Flutter may to be extended to other platform as well in the future.
  • Dart has a large repository of software packages which lets you to extend the capabilities of your application.
  • Flutter needs lesser testing. Because of its single code base, it is sufficient if we write automated tests once for both the platforms.
  • Flutter’s simplicity makes it a good candidate for fast development. Its customization capability and extendibility makes it even more powerful.
  • Flutter offers great developer tools, with amazing hot reload.
  • With Flutter, developers has full control over the widgets and its layout.

Cons:

  • Modern framework tries to separate logic and UI as much as possible but, in Flutter, user interface and logic is intermixed. We can overcome this using smart coding and using high level module to separate user interface and logic.
  • Since it is coded in Dart language, a developer needs to learn new language (though it is easy to learn).
  • Flutter is yet another framework to create mobile application. Developers are having a hard time in choosing the right development tools in hugely populated segment.