Flutter is Google's cross-platform framework written in Dart. From a single codebase you build apps for iOS, Android, web, and desktop. The widget system resembles React — everything is a widget, and combinations produce complex UIs.
Flutter's biggest advantage is native rendering. Where React Native uses a JavaScript bridge, Flutter runs its own Skia/Impeller rendering engine. This guarantees 60/120 fps animations. Hot reload shows changes instantly, effectively doubling development speed.
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