# Flet [![Build status](https://ci.appveyor.com/api/projects/status/xwablctxslvey576/branch/main?svg=true)](https://ci.appveyor.com/project/flet-dev/flet/branch/main) Flet is a framework that enables you to easily build real-time web, mobile, and desktop apps in your favorite language and securely share them with your team. No frontend experience is required. ### ⚡From idea to app in minutes An internal tool or a dashboard for your team, weekend project, data entry form, kiosk app, or high-fidelity prototype - Flet is an ideal framework to quickly hack great-looking interactive apps to serve a group of users. ### 📐 Simple architecture No more complex architecture with JavaScript frontend, REST API backend, database, cache, etc. With Flet you just write a monolith stateful app in Python only and get multi-user, real-time Single-Page Application (SPA). ### 🔋Batteries included To start developing with Flet, you just need your favorite IDE or text editor. No SDKs, no thousands of dependencies, no complex tooling - Flet has a built-in web server with assets hosting and desktop clients. ###    Powered by Flutter Flet UI is built with [Flutter](https://flutter.dev/), so your app looks professional and could be delivered to any platform. Flet simplifies the Flutter model by combining smaller "widgets" to ready-to-use "controls" with an imperative programming model. ### 🌐 Speaks your language Flet is language-agnostic, so anyone on your team could develop Flet apps in their favorite language. [Python](https://flet.dev/docs/guides/python/getting-started) is already supported, Go, C# and others are [coming next](https://flet.dev/roadmap). ### 📱 Deliver to any device Deploy Flet app as a web app and view it in a browser. Package it as a standalone desktop app for Windows, macOS, and Linux. Install it on mobile as [PWA](https://web.dev/what-are-pwas/) or view via Flet app for iOS and Android. ## Flet app example At the moment you can write Flet apps in Python and other languages will be added soon. Here is a sample "Counter" app: ```python title="counter.py" import flet from flet import IconButton, Page, Row, TextField, icons def main(page: Page): page.title = "Flet counter example" page.vertical_alignment = "center" txt_number = TextField(value="0", text_align="right", width=100) def minus_click(e): txt_number.value = str(int(txt_number.value) - 1) page.update() def plus_click(e): txt_number.value = str(int(txt_number.value) + 1) page.update() page.add( Row( [ IconButton(icons.REMOVE, on_click=minus_click), txt_number, IconButton(icons.ADD, on_click=plus_click), ], alignment="center", ) ) flet.app(target=main) ``` To run the app install `flet` module: ```bash pip install flet ``` and run the program: ```bash python counter.py ``` The app will be started in a native OS window - what a nice alternative to Electron! Now, if you want to run the app as a web app, just replace the last line with: ```python flet.app(target=main, view=flet.AppView.WEB_BROWSER) ``` run again and now you instantly get a web app: ## Getting started * [Creating Flet apps in Python](https://flet.dev/docs/guides/python/getting-started) * [Controls reference](https://flet.dev/docs/controls) ## Sample apps in Python * [Greeter](https://github.com/flet-dev/examples/blob/main/python/apps/greeter/greeter.py) ([Online Demo](https://gallery.flet.dev/greeter/)) * [Counter](https://github.com/flet-dev/examples/blob/main/python/apps/counter/counter.py) ([Online Demo](https://gallery.flet.dev/counter/)) * [To-Do](https://github.com/flet-dev/examples/blob/main/python/apps/todo/todo.py) ([Online Demo](https://gallery.flet.dev/todo/)) * [Icons Browser](https://github.com/flet-dev/examples/blob/main/python/apps/icons-browser/main.py) ([Online Demo](https://gallery.flet.dev/icons-browser/)) More demo applications can be found in the [gallery](https://flet.dev/gallery/). ## Community * [Discussions](https://github.com/flet-dev/flet/discussions) * [Discord](https://discord.gg/dzWXP8SHG8) * [Twitter](https://twitter.com/fletdev) * [Email](mailto:hello@flet.dev) ## Contribute to this wonderful project * Read the CONTRIBUTING.md file