What is Flutter

Flutter is an open-source UI software development kit created by Google. It is used to develop cross platform applications for Android, iOS, Linux, macOS, Windows, Google Fuchsia and the web from a single codebase.First described in 2015,[6][7] Flutter was released in May 2017

What is Dart

Dart is a programming language designed for client development, such as for the web and mobile apps. It is developed by Google and can also be used to build server and desktop applications.It is an object-oriented, class-based, garbage-collected language with C-style syntax. It can compile to either native code or JavaScript, and supports interfaces, mixins, abstract classes, reified generics and type inference.