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Butterfly

Take notes, draw freely, and organize ideas across an endless workspace
New in version 2.6.0
Changes since 2.6.0-rc.3:
* Fix fractional-pixel mismatch in the viewport cache ([#1279](https://github.com/LinwoodDev/Butterfly/issues/1279))
* Fix editor state loading and saving across WebDAV connections ([#1281](https://github.com/LinwoodDev/Butterfly/issues/1281))
* Automatically sync pinned files while the app is open and after reconnecting ([#1281](https://github.com/LinwoodDev/Butterfly/issues/1281))

This is a stable release, it includes all the changes from the 2.6.0 nightly releases.
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.

Butterfly tries to stay out of your way while you work. Recent files, quick-start templates, search, folders, imports, page navigation, and tool settings are close when you need them, but the document stays at the center. You can begin with a plain page, ruled paper, a grid, dotted paper, music paper, or your own template.

As your document grows, Butterfly gives you ways to keep it understandable. Split work into pages and page folders, use layers, mark important places with areas and waypoints, save reusable parts in packs, and keep palettes and text styles ready for the next document. Almost everything you add remains editable, so you can move, resize, recolor, reorder, and refine your work later instead of starting over.

Your files stay under your control. Work offline, store documents on your device, choose a different data directory, or connect WebDAV and Nextcloud if you want your own sync setup. There is no required account, no required subscription, and no required proprietary cloud.

Butterfly is free, community translated, available on phones, tablets, desktops, and the web, and developed in public under the AGPL-3.0 license.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 2.6.0 (199) suggested Added on Oct 01, 2026

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 7.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • dev.linwood.butterfly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 120 MiB PGP Signature | Build Log

  • New in version 2.5.5
    This is a hotfix update, cherry-picking important fixes from the latest 2.6.0 betas.

    Cherry picks:
    * Improve context menu background
    * Fix pasted strokes losing their relative positions ([#1202](https://github.com/LinwoodDev/Butterfly/issues/1202))
    * Fix core pack palettes not being editable ([#1199](https://github.com/LinwoodDev/Butterfly/issues/1199))
    * Fix incompatible document loading
    * Fix file grid action menu overlapping the sync indicator in right-to-left layouts
    * Fix file move dialog
  • Version 2.5.5 (192) - Added on Aug 12, 2026

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 7.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • dev.linwood.butterfly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 114 MiB PGP Signature | Build Log

  • New in version 2.5.4
    This is a hotfix update, cherry-picking important fixes from the latest 2.6.0 beta and nightly releases.

    Cherry picks:
    * Prevent crashes when Android SAF handles large folders and files
    * Fix text labels disappearing while editing
    * Fix polygons disappearing while editing
    * Fix renamed files appearing twice in Recent files
    * Fix layers and pages being reordered to the wrong position
    * Improve WebDAV compatibility and select the correct filesystem with SAF enabled
    * Fix the spacer tool for circl
  • Version 2.5.4 (189) - Added on Jul 23, 2026

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 7.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • dev.linwood.butterfly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 114 MiB PGP Signature | Build Log