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Open iOS Settings → Health → Data Access & Devices → Strontr and make sure write access is enabled for Workouts, Active Energy, Walking + Running Distance, Cycling Distance, and Workout Route. Then in Strontr open Settings → Apple Health and toggle the integration off and back on. Existing past sessions don't backfill — only new finishes will write to Health.

• Confirm iOS Settings → Privacy & Security → Location Services is on, and Strontr is set to While Using the App or Always.
• Make sure Precise Location is enabled — without it, distance and route accuracy collapse.
• Wait until the GPS lock indicator turns green before starting. Indoor / heavy-cover starts can take 20–40 seconds.
• If you're running on a treadmill, distance from GPS will be ~0. We'll add manual treadmill entry in a future update. In the meantime, cardio sessions support a duration target, which works well on a treadmill even without distance.

Strontr's core is free: workout and run logging, routines, body metrics, streaks, history and calendar, basic stats, the exercise library, Apple Watch, and widgets. Strontr PRO ($5.99/mo or $39.99/yr) unlocks the Evolve Plan, Cardio Evolve Plan, AI routine generation, and advanced analytics — and every account gets one Evolve Plan and one Cardio Evolve Plan free to try.

Open Settings → Account → Delete Account on iPhone or Android. This wipes all local data immediately and deletes your account and its data from our servers. The action cannot be undone. If you cannot reach the app, email matthew@schauki.com from your account address and we will delete it for you within 30 days.

Yes. Sign in with Apple and your workouts, runs, routines, history, body metrics, and settings sync securely across your iPhone, iPad, and Apple Watch. Install Strontr on a new device, sign in, and everything restores automatically. If you stay signed out, your data simply stays on that one device.

Open Strontr on the iPhone (foreground), pull down once on Home, then re-open the watch app. The phone re-pushes the snapshot via WatchConnectivity on app activation. Make sure both devices are on the latest version and on the same Apple ID.