C2K — Couch to 5K & 10K Exercises and Workouts app for Android description
C2K is a free, open-source running trainer for Android that guides you from the couch to running 5K or 10K — with no Google services, no tracking, and no ads.
Features:
- Couch to 5K (C25K) — 9-week program, 3 runs per week
- Couch to 10K (C210K) — 14-week program
- Audible voice prompts — Start running, Walk for 90 seconds, countdown warnings
- Background workout timer — continues with screen off
- GPS tracking (optional) — records distance and pace; works without GPS too
- Progress tracking — remembers which weeks and days you've completed
- Works offline — no internet permission required
- No Google Play Services required — compatible with GrapheneOS and de-Googled devices
Permissions:
- FOREGROUND_SERVICE — keeps the workout timer running with screen off
- WAKE_LOCK — prevents the CPU sleeping mid-workout
- ACCESS_FINE_LOCATION — optional GPS for distance/pace tracking (you can skip this)
- POST_NOTIFICATIONS — workout notification with pause/stop controls
C2K is free software released under the GNU General Public License v3.
