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Flet 0.86.0: Faster everywhere — new Android packaging, dart-bridge, and Python 3.14

· 15 min read
Feodor Fitsner
Flet founder and developer
Flet 86

Flet 0.86.0 is our "anniversary" release — the last one before 1.0 — and the logo is a nod to Expo 86, the World's Fair held in Vancouver in 1986. Expo 86's theme was "Transportation and Communication", and by a happy coincidence that's exactly what this release is about: how Python and Dart communicate — a new in-process dart-bridge transport replacing sockets, plus dedicated data channels for bulk binary traffic — and how your app is transported to devices, with completely re-designed Android packaging and faster, leaner packaging on every other platform.

Under the retro logo, 0.86 pays down the last big pieces of technical debt on the road to 1.0: direct Python↔Dart communication without sockets, and a real integration-testing story for your apps.

Highlights in this release:

  • Multi-version Python — bundle Python 3.12, 3.13, or 3.14 on all platforms, with the latest Pyodide 314.0.2 on the web and 70+ pre-built Android and iOS binary packages for every supported version.
  • dart-bridge — lightning-fast in-process communication between Python and Dart; no more sockets.
  • Data channels — dedicated byte channels for bulk binary data, bypassing the control protocol.
  • New ft.RawImage control — full-bandwidth pixel streaming from Pillow, NumPy, or camera frames straight to a GPU texture.
  • Faster Matplotlib — raw RGBA frames over data channels: 2.5× higher FPS on interactive charts.
  • Re-designed Android packaging — modern, extraction-free, memory-mapped; smaller and faster apps.
  • Faster startup everywhere — unpacked app bundles, bytecode compilation by default, and lazy import flet.
  • Testing framework — write pytest integration tests for your app and run them on real devices with flet test.
  • Flet MCP server — accurate, version-specific Flet knowledge for your AI agent.
  • Multiprocessing support in packaged desktop apps, custom boot screens, normalized app storage, and more.

Flet Studio: build Python apps in your browser

· 4 min read
Feodor Fitsner
Flet founder and developer

Today we're launching Flet Studio — a browser-based IDE for writing, running, saving, and sharing Flet apps. Your Python code runs entirely in the browser, so there's no account required to try it and no local install required to run something a friend shared with you.

It started life as a playground for Flet apps, but turned out to be much more: a place to prototype, a gallery of editable examples, and a way to send someone a working app as just a link.

Flet 0.85.0: Declarative apps grow up — Router, dialogs, and more

· 8 min read
Feodor Fitsner
Flet founder and developer

Flet 0.85.0 brings first-class declarative navigation and dialog management, richer media controls, and a long list of bug fixes.

Highlights in this release:

  • Declarative ft.Router for @ft.component apps — nested routes, layouts with outlets, dynamic segments, data loaders, and manage_views=True for native view-stack navigation.
  • New ft.use_dialog() hook — dialogs are now reactive state in declarative apps, not imperative page.show_dialog() calls.
  • flet-video: configurable controls, Video.take_screenshot(), and on_position_change / on_duration_change events.
  • AudioRecorder PCM16 streaming via on_stream chunks and direct upload through AudioRecorderUploadSettings.
  • Tons of bug fixes — charts, web assets, packaging, mobile orientation, and more.

Flet 0.84.0: Goodbye MkDocs, hello CrocoDocs!

· 7 min read
Feodor Fitsner
Flet founder and developer

Flet 0.84.0 is a developer-experience release: new documentation website and re-worked examples.

Highlights in this release:

  • Flet docs are back on Docusaurus - fast dev server, working hot reload, unified website.
  • Meet CrocoDocs, our new tool that bridges Python docstrings and Docusaurus.
  • All 466 Flet examples migrated to standalone projects with rich metadata for Gallery and AI discovery.

Flet 0.83.0: Faster diffs, leaner packages, road to 1.0

· 7 min read
Feodor Fitsner
Flet founder and developer

Flet 0.83.0 is here with major performance gains, a reworked packaging pipeline, and better project transparency - all part of our push toward a rock-solid 1.0.

Highlights in this release:

  • Up to 6.7× faster control diffing for both imperative and declarative apps.
  • Smarter .update() logic that eliminates redundant updates.
  • Declarative field validation with Annotated types.
  • Desktop binaries and build templates moved from PyPI to GitHub Releases - smaller installs, pinned versions.
  • Better release traceability with milestones and pre-releases on GitHub.