| Parameters | Flutter | Kotlin |
|---|
| Definition | It is a cross-platform mobile framework that provides mobile app SDK to the developers and designers to build modern mobile apps for iOS and Android. | It is detailed as statically typed programming language for the JVM, Android, and the browser. It is 100% interoperable with Java. |
| Developed By | It is a framework that was first introduced by Google. | It is a programing language that was first introduced by JetBrains. |
| Released | 2017 | 2010 |
| Language Stack | It uses Dart programming to build mobile apps. | It is itself a programing language that uses Java, JVM, JavaScript, and Native for creating applications. |
| Popularity | Its popularity on GitHub has 88.7k stars and 11.7k folks. | Its popularity on GitHub has 31.1k stars and 3.8k folks. |
| Performance | Its performance is amazing because it uses Dart programming, and there is no need to use JavaScript Bridge for starting interactions with the app. | Its performance is slow because it uses JavaScript and 100% interoperable in Java that decreases the speed of an application. |
| Learning Curve | In Flutter, developers must have to learn Dart programming to build an app. | It has an easy learning curve because it is very similar to Java. |
| Documentation | It has well organized and more informative documentation where we can get everything that we want in one place. | It also provides well-structured documentation to the developers. Since it is in the development phase, its libraries can be changed at any time. |
| Testing Support | It has a wide variety of testing features along with a unique widget testing feature. | Its main focus is to deliver backend development services and uses Firebase as a secure backend option. |
| Hot Reload | Supported | Not Supported |
| App Size | The size of the Flutter app is bigger. | The size of the Kotlin app takes less size as compared to Flutter. |
| Integration of third-party libraries and tools | Since Flutter is a UI tool, so it needs third-party libraries and tools to bridge a connection with the native environment. | It does not require third-party libraries and tools to bridge a connection with the native environment. |
| Pricing | It is entirely free to utilize Flutter system tec |
