Apps
Android apps built on the same principle: your data lives on your device, in Android Health Connect where it belongs, not on a server. No accounts, no analytics, no adverts.
Cairn
Body-measurement tracker for Android & Wear OS
Logs weight, body composition and heart rate straight into Android Health Connect, and reads your watch’s own steps, sleep and activity back for context.
Trailhead
Workout-programme tracker for Android
Lines up your next session, reminds you on training days, and counts progress in sessions, not dates — the companion to Cairn.