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Solo Forge

Local-first intermittent fasting, calorie, weight & workout tracker
New in version 0.1.3
Saved meal presets: turn any logged or manual meal into a one-tap "Quick add" button on the Food screen. Great for prepped meals you eat repeatedly, with no photo or AI call. Long-press a preset to remove it.
Solo Forge is a free and open source Android fitness app: an intermittent fasting timer, calorie and macro counter, weight tracker, and workout timer in one. No ads, no tracking, fully offline.

It is built around local data ownership:

* No backend
* No accounts
* No analytics
* No crash reporting
* Android cloud backup disabled
* Explicit CSV export to a folder you choose

Features:

* Intermittent fasting timer with 16:8, 18:6, 20:4, and 36 hour modes
* State-driven fasting reminders instead of daily notification spam
* Food photo analysis using your own OpenRouter API key
* Manual meal entry and editable macro estimates
* Local calorie and macro goals
* Weight history with charting
* Simple, interval, and exercise/rest workout timers
* Dashboard for fasting, nutrition, weight, workout time, and streaks

Solo Forge sends a network request only when you start food photo analysis. That request goes to OpenRouter using the API key you provide. All saved meals, weight entries, workouts, fasting history, settings, and exports remain local to your device.

Solo Forge is licensed under GPL-3.0.

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 0.1.3 (4) suggested Added on Jun 21, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 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.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • 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.
    • show notifications
      Allows the app to show notifications
    • 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.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.kbul.spicycrab.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.7 MiB PGP Signature | Build Log

  • New in version 0.1.2
    Fix release minification for F-Droid builds.
  • Version 0.1.2 (3) - Added on May 28, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 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.
    • take pictures and videos
      This app can take pictures and record videos using the camera while the app is in use.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • 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.
    • show notifications
      Allows the app to show notifications
    • 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.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.kbul.spicycrab.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.7 MiB PGP Signature | Build Log