Support

Answers first, mail second.

How does ampulse work?

ampulse records directly from Polar Loop and compatible training sensors, then stores the received data and its calculations on your iPhone. Without a Loop, it can import nights written to Apple Health. Available measurements depend on your devices and source apps.

A night is missing?

For Polar Loop, open ampulse and sync while the band is nearby. The night needs a completed recording and a successful transfer; check the sync status if it does not appear. For Apple Health, first check that the source app has written sleep data to Health. Enable Health import in ampulse, allow sleep access, and reopen ampulse after the source has synced.

The strap shows no α1?

DFA α1 needs a supported strap supplying sufficiently clean RR intervals. A pulse-only sensor can provide heart rate without providing the intervals needed for this calculation. Check the connection and signal quality; a connected device does not guarantee a valid α1 window.

Does it work with Garmin HRM or CooSpo straps?

ampulse reads the standard Bluetooth Heart Rate service, including RR intervals when supplied. Bluetooth-capable Garmin HRM and CooSpo chest straps may provide these data; ANT+-only models cannot connect through that service. Check the exact model and its RR support before buying. The Polar H10 supports the interval-based training workflow. DFA α1 threshold markers are estimates, not a substitute for individually measured laboratory thresholds.

How do I cancel the subscription?

Settings → your Apple ID → Subscriptions → ampulse. Apple handles all billing; cancelling stops the next renewal immediately, and everything already banked stays on your phone.

Still stuck?

Write to support@ampulse.fit — a human reads it.