Editable training
Create phases and templates, change exercises and prescriptions, and reschedule sessions without rewriting completed work.
JopDev project · Progressive web app
Your training system should grow with you.
Athlete OS keeps workouts, nutrition, goals, progress, and coaching changes in one focused place—while your personal records stay in your browser on your device.
Private by design. No account, API key, or backend is required. Fitness records are not sent to JopDev.
TODAY
Your training cockpit
NEXT SESSIONLower Strength3 movements · 17:30
View prescriptionDAILY FUELSet your targetBODY WEIGHTPrivate & local
BUILT TO EVOLVE
Plans change. Your history shouldn’t.
Effective-dated nutrition
Plan calorie and macro changes while historical compliance stays tied to the target that applied that day.
Goals and analytics
Define custom metrics, record milestones, and keep prescribed, completed, and historical data clearly separated.
Safe Coach Updates
Paste versioned JSON from ChatGPT, preview every proposed change, approve items individually, and undo an applied update.
INSTALL THE WEB APP
Athlete OS lives on your home screen.
This is a progressive web app (PWA), not a native App Store download. There is no IPA or APK file.
Install on iPhone
- Open Athlete OS in Safari.
- Tap Share.
- Choose Add to Home Screen.
- Turn on Open as Web App.
- Tap Add.
In short: Open in Safari > Share > Add to Home Screen > Open as Web App > Add.
Open in SafariInstall on Android
- Open Athlete OS in a supported browser such as Chrome.
- Tap Install app when offered.
- If it is not shown, open the browser menu and choose Install app or Add to Home screen.
The install prompt appears only in supported browsers after the app opens.
Local-first data
Your records belong to you.
Athlete OS starts with no personal logs. Browser updates do not erase IndexedDB records under normal storage behavior. Complete JSON backup and validated restore are built in for portability and recovery.