What is Flutter repo?

Flutter is an open source framework by Google for building beautiful, natively compiled, multi-platform applications from a single codebase.

The Flutter Engine is a portable runtime for hosting Flutter applications . It implements Flutter’s core libraries, including animation and graphics, file and network I/O, accessibility support, plugin architecture, and a Dart runtime and compile toolchain.

Flutter is an open source UI toolkit for building beautiful, natively compiled applications for mobile, web, desktop, and embedded devices from a single codebase . Flutter is primarily funded by Google with contributors from all around the world.