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Hammer

A simple tool for building stories.
New in version 3.9.1
- Fix sharing scene order
- Fix PDF export crash

Full changelog:
https://github.com/Darkrock-Studios/hammer-editor/releases/tag/v3.9.1
Please join our Discord to report issues! https://discord.gg/GTmgjZcupk

Multi-platform

This app is where ever you are. Your phone, tablet, desktop, laptop, this program can be installed and run, not simply a website-in-a-box, but instead using native client side technologies to provide the best experience possible.

Offline first

I was frustrated with most of the story writing software I was finding as they were using web technologies (aka: Web Page in a box) which always seems to run into problems while being used offline for long periods of time. Hammer is designed from the ground up to be entirely local, no internet connection required, ever.

Transparent Data

Your data is yours. It's not stored in the cloud, or some opaque database. It is stored in simple, human readable files, just using files and folders to define the project structure. You can open your OSes file browser and take a look for your self. If this program went away today you would be able to easily interact with your data.

Intelligent Syncing between devices

Your data can be synchronized between devices allowing you to work on your story from anywhere, and have no fear of a change on one device, overwriting a change on another device.

Optional and Self hosted Syncing

Syncing is entirely optional, you can install the client and use it on one device, or you can install the server and sync your data between devices.

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 3.9.1 (309020000) suggested Added on Aug 21, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

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

    Permissions
    • android.permission.ACCESS_LOCAL_NETWORK
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • access Do Not Disturb
      Allows the app to read and write Do Not Disturb configuration.
    • run foreground service
      Allows the app to make use of foreground services.
    • 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.
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • com.darkrockstudios.apps.hammer.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 15 MiB PGP Signature | Build Log

  • New in version 3.8.2
    - About: Dark Rock Studios attribution screen improved, check it out!
    - Translations updated for German, Spanish, French, Italian, Portuguese (Brazil), and Ukrainian
    Fixes

    Full changelog:
    https://github.com/Darkrock-Studios/hammer-editor/releases/tag/v3.8.2
  • Version 3.8.2 (308030000) - Added on Aug 13, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

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

    Permissions
    • android.permission.ACCESS_LOCAL_NETWORK
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • access Do Not Disturb
      Allows the app to read and write Do Not Disturb configuration.
    • run foreground service
      Allows the app to make use of foreground services.
    • 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.
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • com.darkrockstudios.apps.hammer.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 14 MiB PGP Signature | Build Log

  • New in version 3.8.1
    Improvements
    - text editor no longer drops block structure (horizontal rules, images, code fences) when a scene loads
    - font size changes no longer flatten list and blockquote indents
    - typed text after a size change could lose the paragraph's body style
    - F3 and Ctrl+Alt+S sync shortcuts work from anywhere in the project window
    - tag suggestion chips could add the typed prefix instead of the selected tag…

    Full changelog:
    https://github.com/Darkrock-Studios/hammer-editor/releases/tag/v3.8.1
  • Version 3.8.1 (308020000) - Added on Aug 11, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

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

    Permissions
    • android.permission.ACCESS_LOCAL_NETWORK
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • access Do Not Disturb
      Allows the app to read and write Do Not Disturb configuration.
    • run foreground service
      Allows the app to make use of foreground services.
    • 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.
    • android.permission.MANAGE_EXTERNAL_STORAGE
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • com.darkrockstudios.apps.hammer.android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 14 MiB PGP Signature | Build Log