Some of the major features of using Flutter is,
Fast Development - With the use of a rich set of fully customizable widgets, you can build native interfaces in minutes with Flutter.
Expressive and Flexible UI - The layered architecture present with the Flutter enables you to fully customize your UI. This results in fast rendering and expressive designs.
Native Performance - The widgets present in the Flutter incorporate all the critical platform differences such as scrolling, navigation, icons, and more. It gives a full native performance on all platforms