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Linwood Butterfly Nightly

Powerful, minimalistic, cross-platform, opensource note-taking app
New in version 2.5.1-rc.1
* Add edge pan area switching experimental feature
* Add bounds for viewport inside current area
* Add selection mode for areas, layers, and pages navigator view
* Add current area on page creation
* Improve zoom control settings
* Fix inline editing in editable list tile on mobile
* Fix document not saving when changing documents in file navigator
* Fix duplicate page creation when adding new pages
* Fix initial area not opened on page change
* Fix elements not rendering initially without resiz
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.

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 2.5.1-rc.1 (175) suggested Added on Apr 21, 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.nightly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 105 MiB PGP Signature | Build Log

  • New in version 2.5.1-rc.0
    * Add content viewport option to behavior settings
    * Add limit viewport to positive coordinates option to behavior settings
    * Restructure view and behavior settings
    * Improve rendering performance by reusing paint objects in grid rendering
    * Change settings defaults
    * `sort_by` to `modified`
    * `sort_order` to `descending`
    * `delayed_autosave` to `true`
    * `autosave_delay_seconds` to `3`
    * `hide_extension` to `true`
    * `show_thumbnails` to `true`
    * Fix broken Android monochrome app icon
  • Version 2.5.1-rc.0 (174) - Added on Apr 14, 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.nightly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 105 MiB PGP Signature | Build Log

  • New in version 2.5.0-rc.2
    * Improve pdf rendering
    * Add toggle presentation to keyboard shortcuts settings page
    * Change toggle presentation to ctrl + space
    * Fix space not working in text input fields
    * Fix pdf export dialog overflow on mobile devices
    * Fix thumbnails not loading in pdf export dialog
    * Fix polygon disappearing after editing
    * Add warning to data folder setting on mobile
    * Add confirmation dialog when changing data folder
    * Replace Readex Pro with Noto Sans Arabic
    * Improve template selection UI

    Read mo
  • Version 2.5.0-rc.2 (172) - Added on Apr 02, 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.nightly.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 104 MiB PGP Signature | Build Log