is an open-source UI software development kit created by Google. It is used to develop applications for Android, iOS
, Windows, Mac, Linux, Google Fuchsia and the web. Flutter apps are written in the Dart language. Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase. Flutter code is compiled to native ARM machine code using Dart's native compilers. Thus Flutter gives you full native performance on both iOS and Android.