Flet 1.0 – Build cross-platform apps in Python

# Build cross-platform apps in Python | Flet Source: [https://flet.dev/](https://flet.dev/) [Meet Flet 1\.0](https://flet.dev/blog/flet-1-0) ## Your next app\. Built inPython\. Build beautiful web, desktop, and mobile apps from one Python codebase\. No frontend experience required\. Just Python\. One codebase\. **Make yourself at home\.** - iOS - Android - Windows - macOS - Linux - Web A SIMPLE EXAMPLE ## Your first Flet app\. Start with a simple counter to see how Flet turns Python code into an interactive app\. 1. ### Build the interface Use ready\-made controls for the text and button\. Arrange them with Python\. 2. ### Add the behavior Connect the button to a Python function that increases the count\. TRY IT YOURSELF [Try online](https://studio.flet.dev/gallery/getting-started/example/apps/templates/basic_counter) Open Flet Studio\. No installation needed\. [Try locally](https://flet.dev/docs/getting-started/installation) Follow the installation guide for uv or pip\. ``` import flet as ftdef main(page: ft.Page): counter = ft.Text("0", size=50, data=0) def increment(e): counter.data += 1 counter.value = str(counter.data) page.floating_action_button = ft.FloatingActionButton( icon=ft.Icons.ADD, on_click=increment ) page.add( ft.Container( content=counter, alignment=ft.Alignment.CENTER, expand=True, ) )ft.run(main) ``` flet run counter\.py BUILT FOR THE WHOLE JOURNEY ## More than a pretty interface\. The controls, libraries, and tools to take your app from an experiment to something you ship\. ### Good\-looking Python GUIs 150\+ controls and services\. Layouts, navigation, forms, and dialogs, with customizable colors, typography, and themes\. [Explore the controls](https://flet.dev/docs/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](https://flet.dev/docs/reference/binary-packages-android-ios) ### 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](https://flet.dev/docs/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](https://flet.dev/docs/publish/web) ### 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](https://flet.dev/docs/getting-started/integration-testing) ### 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](https://flet.dev/docs/cookbook/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](https://flet.dev/docs/extend/user-extensions) ### Build for more people Support screen readers with labels and custom semantics\. Add keyboard shortcuts and inspect the accessibility information your UI exposes\. [Explore accessibility](https://flet.dev/docs/cookbook/accessibility) MEET FLET STUDIO ## An idea is a great place to start\. Open your browser\. Pick an example, write some Python, or ask the AI agent for a hand\. Run your app and share what you make\. [Create in Studio](https://studio.flet.dev/)No installation required\. 01 ### Find your starting point Explore the Gallery and make an example your own\. 02 ### Make it work your way Edit the code, get help from AI, and see your app run\. 03 ### Share what you made Send a link, or download your project and keep building locally\. [Explore the Gallery](https://studio.flet.dev/gallery)