What is Flutter?
Flutter allows you to build native cross-platform (iOS, Android, web, Windows, macOS, Linux) apps with one programming language and codebase. In a nutshell, it is an SDK & Framework bundle:
One may be tempted to assume then that Flutter is only for making interfaces. Far from that. Creating a UI in Flutter is not done using a WUSIWYG editor. Thanks to the hot-reload capabilities of the SDK, you see your changes reflected as soon as you save your source code and Flutter’s moto is “UI as Code”. We build our UI as a tree, starting with a root widget and add children widget inside and so on.