Privacy-first offline fitness tracker with AI rep counter and gamification
About this app
Spix is your elegant, privacy-first fitness companion that works 100% offline.
PRIVACY & PHILOSOPHY Because your health data belongs to YOU, Spix was designed to be completely transparent: • 100% Local & Offline: Works without internet. Your data stays on your device. • Secure Camera: Used only for real-time movement detection in Rep Counter. No images are saved or sent. • Accelerometer Alternative: Privacy-conscious? Use sensor-only mode to count reps without the camera. • Optional Social Features: Social features are completely optional. You stay in control. • Complete Deletion: One-click account deletion removes all your data instantly. • No Data Selling: Never. This is a passion project, not a commercial product.
MAIN FEATURES
Dashboard & Tracking • Today Screen: Synthetic view with weekly progress ring and calendar • Complete Tracking: 4 dedicated modes (Home Workout, Running, Meals, Measurements) • History: Full journal with filters and quick deletion • Health Connect (Android): Smart automatic import of your workouts from other apps
Intelligent Rep Counter Put down your phone and let AI work for you: • Detection: Analysis via Camera (local Pose Detection) or Accelerometer • Exercises: Support for Push-ups, Squats, Sit-ups, Jumping Jacks • Feedback: Smooth animations and visual coaching
Tools & Gamification • Workout Generator: Create custom workouts (Duration, Focus, Intensity) • Streak System: Maintain your streak to unlock visual rewards • Badges: 10+ trophies to unlock (From "First Step" to "Legend") • Statistics: Interactive charts to visualize your progress (Weight, Activity)
TECH STACK Built with React Native, Expo SDK 54, TypeScript, and local-first architecture using Zustand + MMKV for blazing-fast offline performance.
OPEN SOURCE Spix is open source under AGPL-3.0 license. Contributions welcome!
Licensed under AGPL-3.0-or-later, by LuckyTheCookie - Lucas THIEBAUT.
What's New in v11.7.0
Imported from the F-Droid repository index.
Version history
Apr 28, 2026 · 60.1 MB · Android API 26–36 · code 110704
Imported from the F-Droid repository index.
SHA-256 174bce2f8190d40015ff406da06e1606198fee411069019af47a8f17ea5905a5
Apr 28, 2026 · 59.8 MB · Android API 26–36 · code 110703
Imported from the F-Droid repository index.
SHA-256 ced87c1eb74c8b6854a6f9e6f4385cb0584c4ea76fdcef86a454c3d22ec34bc8
Apr 28, 2026 · 72.4 MB · Android API 26–36 · code 110702
Imported from the F-Droid repository index.
SHA-256 f4e70e693c501f81dca98d3bc22d1fae66233c2e2ca63a98def35c0454fc18dc
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.spix.app.foss 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, 11.7.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Spix - Privacy Fitness Tracker 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 Spix - Privacy Fitness Tracker, and a listing is removed when the evidence for it stops holding up.
Get Spix - Privacy Fitness Tracker
Every source we list for com.spix.app.foss 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
174bce2f8190d40015ff406da06e1606198fee411069019af47a8f17ea5905a5
Signing certificate
0754fc739fb664350e63f911b1df18fb755cf2de1bf814899ebf0d34212a187f
Permissions Required
What each permission lets Spix - Privacy Fitness Tracker 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.
More Health Fitness apps
More from F-Droid
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.