# Butterfly (open-source notes app)

> Butterfly is a free, open-source notes app for Android. Take notes, draw freely, and organize ideas across an endless workspace. It has 2,048 GitHub stars and is released under the AGPL-3.0-only license, and you can install it from F-Droid.

Butterfly is an open-source app for people who think better with space around their ideas. Instead of writing everything from top to bottom on a fixed page, you get an endless workspace where you can place notes, sketches, diagrams, images, and documents wherever they make sense. Use it for class notes, meeting notes, research, math, worksheets, planning, whiteboarding, storyboards, product sketches, or any project that starts messy and needs room to grow. Write by hand with a stylus, touch, or mouse, type text and Markdown, add shapes and lines, place images and photos, import PDFs, SVGs, and image files, then export your work as PDF, SVG, images, or portable Butterfly files.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/LinwoodDev/Butterfly |
| Platforms | Android |
| Built with | Flutter |
| GitHub stars | 2,048 |
| License | AGPL-3.0-only (open source) |
| F-Droid | https://f-droid.org/packages/dev.linwood.butterfly/ (package dev.linwood.butterfly) |
| F-Droid anti-features | none flagged |
| Google Play | not linked |
| App Store | not linked |
| Website | https://butterfly.linwood.dev |
| Official | no |
| Category | Notes & to-do |
| Latest release | v2.6.0 (Sep 28, 2026) |
| Last commit | Oct 7, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

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