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Flutter › Flutter Material Design Components

What is Material Design, and how does Flutter's built in Material widget library let you quickly build an app that follows Google's own well established design guidelines?

Beginner

Answer

Material Design is Google's comprehensive, well established design system providing detailed guidelines for typography, color, spacing, and interactive component behavior, originally created specifically for Android but now genuinely widely adopted across many different platforms, and Flutter's built in Material widget library provides fully ready made implementations of essentially every core Material component, including buttons, cards, and navigation elements, letting you very quickly build an app that already properly follows these well established, thoroughly considered design guidelines without needing to design and implement every single individual interactive component entirely completely from scratch yourself.
MaterialApp(
  home: Scaffold(
    appBar: AppBar(title: Text('My App')),
    body: Center(child: ElevatedButton(onPressed: () {}, child: Text('Click Me'))),
  ),
)
Real-world example A new startup builds their entire app's initial interface using Flutter's built in Material widgets, immediately achieving a genuinely professional, polished, and familiar looking result without needing to invest significant additional time separately designing every single individual interactive component completely from scratch themselves.

Common follow-ups: What is the difference between Material 2 and the considerably newer Material 3 design system?;How does using Material widgets specifically affect an app's overall look and feel on iOS devices?