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Flet 1.0 – Build cross-platform apps in Python

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Why This Matters

Flet 1.0 offers Python developers a way to build and ship cross-platform apps—desktop, mobile, and web—without switching languages or dealing with native dependency compilation, potentially lowering the barrier for Python developers to enter mobile and desktop app development. This matters because it could expand Python's reach beyond data science and scripting into full-fledged consumer app development, competing with frameworks like Flutter and React Native.

Key Takeaways

The controls, libraries, and tools to take your app from an experiment to something you ship.

BUILT FOR THE WHOLE JOURNEY

BUILT FOR THE WHOLE JOURNEY More than a pretty interface.

Good-looking Python GUIs 150+ controls and services. Layouts, navigation, forms, and dialogs, with customizable colors, typography, and themes. Explore the controls ↗

Your Python libraries. On mobile. Bring NumPy, pandas, Pillow, and cryptography along. Prebuilt packages for iOS and Android save you the work of compiling native dependencies. Browse Python packages ↗

Ready to ship Package your app for desktop, mobile, and web with flet build. Prepare it for distribution, including the App Store and Google Play. Build and publish ↗

The web, your way Run Python in the browser with Pyodide and WebAssembly, or keep your code on a server and send real-time UI updates. Explore web deployment ↗

Test your app Write pytest tests that tap buttons, enter text, and check user flows in your packaged app. Catch visual changes with screenshots on iOS and Android. Test your app ↗

Give your AI the right context Connect your coding assistant to Flet MCP for version-specific API information and tools to find examples, icons, and CLI options. Connect Flet MCP ↗

Make it your own Compose custom controls in Python or wrap Flutter packages in extensions to add new UI components and platform integrations. Build an extension ↗