Local-first intermittent fasting, calorie, weight & workout tracker
About this app
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 * Full backup and restore to a single file, with optional auto-backup 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 * Daily journal notes on the progress calendar
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.
Licensed under GPL-3.0-only, by kirilan.
What's New in v0.3.0
Imported from the F-Droid repository index.
- Write a daily journal note right on the Home calendar — tap any day to add or edit it. Back up everything (entries, journal, settings) to a single JSON file and restore it on a new install, either merging with existing data or replacing it. Setting a backup folder now keeps a continuously updated backup file there; this replaces the old CSV export.
Version history
Jul 6, 2026 · 3 MB · Android API 26–35 · code 6
Imported from the F-Droid repository index.
- Write a daily journal note right on the Home calendar — tap any day to add or edit it. Back up everything (entries, journal, settings) to a single JSON file and restore it on a new install, either merging with existing data or replacing it. Setting a backup folder now keeps a continuously updated backup file there; this replaces the old CSV export.
SHA-256 6393bcdbb2d0e5b8a73449c43b414d2443a8317d4934adcd807c994914cb78d3
Jul 5, 2026 · 3 MB · Android API 26–35 · code 5
Imported from the F-Droid repository index.
- Type a food description like "100 g watermelon" to get calories and macros without a photo. New setting to turn off all AI features and hide their buttons. Edit the date and time on food and weight entries (great for logging just past midnight). Dark splash screen on dark-themed devices.
SHA-256 a47974b0ea9e4778f6e7a910be2db91d15de4b933cd5be8f7ac60094ae75e6fe
Jun 21, 2026 · 2.7 MB · Android API 26–35 · code 4
Imported from the F-Droid repository index.
- 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.
SHA-256 7292ffaf3c2646a8a7f2a117cfad9484e56b21b04a6dd046f94293515fa587a0
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.kbul.spicycrab is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 0.2.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Solo Forge first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Solo Forge, and a listing is removed when the evidence for it stops holding up.
Get Solo Forge
Every source we list for com.kbul.spicycrab is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
6393bcdbb2d0e5b8a73449c43b414d2443a8317d4934adcd807c994914cb78d3
Signing certificate
37bd6252441cb925fa6c0d72013e145e9ed880402b098f194fb55b3f1dbea966
Permissions Required
What each permission lets Solo Forge do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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