Powerful, minimalistic, cross-platform, opensource note-taking app
About this app
Butterfly is a note-taking app where your ideas come first. You can paint, add texts, and export them easily on every device. This app works on Android, Windows, Linux, and in the web.
* Simple and intuitive: Every tool is in the right place. Open the app and start drawing. Change your tools by clicking on them. * Customizable: Change everything to your needs. Choose your custom color, create a palette, and add your pages to the paper. The paper has an infinite size, perfect for your ideas and notes. * Supports your favorite formats: Import and export are supported for images, PDF and SVG. Open these files directly to edit them. * Works on every device: The app is available for Android, Windows, Linux, and in the web. You can use it on your phone, tablet, or computer. * Choose where your data is stored: You can choose to store your data locally or in your favorite cloud (WebDAV). You can also export your data to a file and import it again. * Available in many languages: The app is available in many languages. Help us to translate this app to your language. * FOSS: The app is open source and free. You can contribute to the project and help to make it better. * Use it offline: You can use the app offline. You can draw, paint, and export your notes without an internet connection. * Use your favorite stylus: The app supports stylus and touch devices. You can draw and paint with your favorite stylus. * Write text: You can write text on your notes. You can change the font, size, and color. * Take photos: You can take photos and add them to your notes. You can also import photos from your gallery. * Editable: You can change the size, color, and position of every element after you added it to your note. * Add shapes: You can add shapes to your notes. You can choose between a rectangle, circle and line. * Structure your notes: Add areas and waypoints to your notes to keep them organized.
Licensed under AGPL-3.0-only, by Linwood.
What's New in v2.6.0-beta.2
Imported from the F-Droid repository index.
- * Add persistent document states ([#1077](https://github.com/LinwoodDev/Butterfly/issues/1077))
- * Reorder top corner menu to have home on top ([#1161](https://github.com/LinwoodDev/Butterfly/issues/1161))
- * Rebuild internal settings pages
- * Add search bar to settings pages ([#1158](https://github.com/LinwoodDev/Butterfly/issues/1158))
- * Always have settings value on the right side
- * Add settings descriptions
Version history
Jul 14, 2026 · 119.4 MB · Android API 24–36 · code 188
Imported from the F-Droid repository index.
- * Add persistent document states ([#1077](https://github.com/LinwoodDev/Butterfly/issues/1077))
- * Reorder top corner menu to have home on top ([#1161](https://github.com/LinwoodDev/Butterfly/issues/1161))
- * Rebuild internal settings pages
- * Add search bar to settings pages ([#1158](https://github.com/LinwoodDev/Butterfly/issues/1158))
- * Always have settings value on the right side
- * Add settings descriptions
SHA-256 992e79b83ae733f6b8db3978ce8fb36d8afa5ae2cb5497a37e8d4a555bd7f62d
Jun 24, 2026 · 111.2 MB · Android API 24–36 · code 186
Imported from the F-Droid repository index.
- * Add tool presets ([#1070](https://github.com/LinwoodDev/Butterfly/issues/1070))
- * Add tool favorites
- * Add element paints to replace current color property
- * Add texture paint ([#1062](https://github.com/LinwoodDev/Butterfly/issues/1062))
- * Add gradient paint ([#93](https://github.com/LinwoodDev/Butterfly/issues/93))
- * Add blur
SHA-256 855a7b6e14add52c153f577f1506d12c8a5e7360ac8f17f41381594223756b23
Jun 3, 2026 · 114 MB · Android API 24–36 · code 184
Imported from the F-Droid repository index.
- * Fix polygon tool toolbar does not change currently edited element
- * Fix raycasting on rotated elements ([#1118](https://github.com/LinwoodDev/Butterfly/issues/1118))
- * Fix non convex polygon intersecting ([#1109](https://github.com/LinwoodDev/Butterfly/issues/1109))
- * Fix moved or renamed files behaving strangely in recent files ([#1114](https://github.com/LinwoodDev/Butterfly/issues/1114))
- Read more here: https://linwood.dev/butterfly/2.5.3-rc.1
SHA-256 873f5ae4c1caffbbf2bd671b326e1af5cc5f0ba9aaef40d0a0d2a9d52ab96af3
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be dev.linwood.butterfly.nightly is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 2.6.0-beta.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Linwood Butterfly Nightly first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Linwood Butterfly Nightly, and a listing is removed when the evidence for it stops holding up.
Get Linwood Butterfly Nightly
Every source we list for dev.linwood.butterfly.nightly is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
992e79b83ae733f6b8db3978ce8fb36d8afa5ae2cb5497a37e8d4a555bd7f62d
Signing certificate
60a8a048ee87d5e7200c4346279c2057e3aa140da652f1e068d6464ab6b32829
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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