flet
Flet for Python - easily build interactive multi-platform apps in Python
Decision gist · record as of 2026-08-14
Yes, if you want to build cross-platform apps in pure Python without learning frontend languages or frameworks. The project is actively maintained, has no known vulnerabilities, and offers a permissive license. Install friction is low. The main gotcha is the Python 3.10 requirement and the need for platform-specific tooling to package for mobile and desktop—not a blocker for web or desktop development on your own machine, but worth planning for if you intend to ship to app stores.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Desktop and mobile builds require platform-specific tooling; web deployment uses WebAssembly.
- Installation is straightforward with a pure-Python wheel.
License · maintenance · safety
Apache-2.0 (permissive) — Licensed under Apache-2.0 (permissive), so you can use Flet in commercial and private projects without restriction, though you must include a copy of the license.
last release 2026-08-01 (13 days) · last repo commit 2026-08-14 · 16,577 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 480,198 downloads/mo, #6,431 on PyPI
Alternatives
Verify before relying
pip install 'flet[all]'
import flet as ft
def main(page: ft.Page):
page.add(ft.Text("Hello, Flet!"))
ft.run(main)- Whether the 150+ built-in controls and 50+ Python packages for iOS/Android mentioned in the description are current as of version 0.86.5
- Performance characteristics and limitations when running complex apps via WebAssembly on web
- Maturity and stability of iOS/Android packaging relative to desktop platforms
What it is and what it does
Flet is a Python framework that lets you write cross-platform applications—for iOS, Android, Windows, Linux, macOS, and web—all in Python without needing to learn Dart, Swift, Kotlin, HTML, or JavaScript. It wraps Flutter's rendering engine and provides a Python API to Material and Cupertino UI controls, layout primitives, dialogs, and charts. You write a single codebase and Flet handles compilation and packaging for each target platform.
The framework is designed for developers who want to ship native-looking apps quickly without frontend expertise. It includes built-in packaging tools to generate standalone executables and app bundles, supports real-time testing on mobile devices via the Flet App, and can deploy web apps either as WebAssembly-based client-side apps or as server-side Python web applications with live UI updates. It depends on httpx, oauthlib, msgpack, repath, and typing-extensions for HTTP, authentication, serialization, and utility functions.
Use it for
- Build a cross-platform desktop application (Windows, macOS, Linux) from a single Python codebase without Electron
- Create a mobile app for iOS and Android that you can test on your own device and deploy to app stores
- Develop a web application that runs in modern browsers using WebAssembly, with no server infrastructure required
- Prototype a data-driven dashboard or tool that needs to run on multiple platforms with consistent UI
- Wrap Python libraries like numpy, pandas, or opencv in a native GUI for distribution to end users
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you want to build cross-platform apps in pure Python without learning frontend languages or frameworks.
The project is actively maintained, has no known vulnerabilities, and offers a permissive license. Install friction is low. The main gotcha is the Python 3.10 requirement and the need for platform-specific tooling to package for mobile and desktop—not a blocker for web or desktop development on your own machine, but worth planning for if you intend to ship to app stores.
Install
flet on PyPI
Before you install
Installation is straightforward with a pure-Python wheel. The package has low install friction and active maintenance—the repository shows recent commits and the project released within the last two weeks.
Requires Python 3.10 or later. Desktop and mobile builds require platform-specific tooling; web deployment uses WebAssembly.
License in practice
Licensed under Apache-2.0 (permissive), so you can use Flet in commercial and private projects without restriction, though you must include a copy of the license.
Quickstart
pip install 'flet[all]'
import flet as ft
def main(page: ft.Page):
page.add(ft.Text("Hello, Flet!"))
ft.run(main)Verify before relying
- Whether the 150+ built-in controls and 50+ Python packages for iOS/Android mentioned in the description are current as of version 0.86.5
- Performance characteristics and limitations when running complex apps via WebAssembly on web
- Maturity and stability of iOS/Android packaging relative to desktop platforms
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 5 packagesoauthlibhttpxrepathmsgpacktyping-extensions |
| Maintenance | Actively maintained 13 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 480,198 / month, #6,431 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: flet-0.86.5-py3-none-any.whl
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See also flet-cli · flet-desktop · flet-web · Kivy · buildozer · reflex · PyQt5 · quip · PyQt6 · htag