What is the purpose of MaterialApp in Flutter?

MaterialApp is the starting point of your app, it tells Flutter that you are going to use Material components and follow material design in your app. Scaffold is used under MaterialApp , it gives you many basic functionalities, like AppBar , BottomNavigationBar , Drawer , FloatingActionButton etc.

MaterialApp class Null safety. An application that uses material design . A convenience widget that wraps a number of widgets that are commonly required for material design applications. It builds upon a WidgetsApp by adding material-design specific functionality, such as AnimatedTheme and GridPaper.

As a rule of thumb, if you happen to import material. dart library to use a certain widget, then you’re building a material app. otherwise your app is non-material . You can find more use information in the MaterialApp class official documentation.