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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 3.7.2 (307030000) suggested Added on Jul 31, 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 3.7.0
[New]
- Encyclopedia: search by #tag, combined with name search
- Desktop: Ctrl+Q closes the app from the project selection window
- Crash reports now include the full stack trace in the exported logs
(Android, Desktop, and iOS)

[Improve]
- Server connections are now HTTPS-only. If you sync with a self-hosted
server over plain HTTP, it must be put behind HTTPS before upgrading.
two-tier footer

[Fix]...

Full changelog:
https://github.com/Darkrock-Studios/hammer-editor/releases/tag/v3.7.0
• Version 3.7.0 (307010000) - Added on Jul 26, 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 3.6.1
- [New] Re-added translations
- [New] iOS can now export logs
- [Fix] Encyclopedia image selection
- [Fix] Focus mode UI padding on Desktop
• Version 3.6.1 (306020000) - Added on Jul 15, 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