Google Flutter and Dart

What Is Flutter?
Flutter is an open-source UI framework for creating high-level native interfaces on Android and iOS. The initial release of Flutter alpha by Google happened in May 2017. Flutter apps can be written in the Dart programming language. The Flutter Beta version was announced by Google in February at the Mobile World Congress 2018.
Dart shares features with many of other languages like Kotlin and Swift and it can be easily transpiled into JavaScript code. Flutter is open source and free to use. It can work with your existing code. As Flutter allows for a reactive and declarative style programming it resembles React Native. There is no need to use a bridge in a Flutter to improve overall performance and startup time. By using Dart it will automatically achieve Ahead-of-Time compilation (AOT).