Heart Rate MonitorYour heart rate, in zones.
Connect your Bluetooth chest strap, armband or watch and see which zone you're in, second by second, in numbers you can read from across the room. No account, no extra app.
Live zones
Your heart rate in the color of its zone, a bar that zooms on where you are, and a live chart of the last minutes.
Your zones, your way
From your max heart rate or your heart rate reserve (Karvonen). No max yet? Estimate it from your age.
As you go
Time in each zone, average and max heart rate, calories, and beat-to-beat HRV from chest straps that send it.
See how hard you really worked.
- Heart rate recovery in the minute after you stop
- A workout chart you can pinch to zoom, down to every second
- Intervals found for you, with time in zones for each
- Share a workout card with friends in one tap
Works with your sensor
Any sensor using the standard Bluetooth heart rate profile. The app finds the one you're wearing, shows its battery and reconnects on its own.
- Polar H10, H9, OH1, Verity Sense
- Garmin HRM-Pro, HRM-Dual
- Wahoo TICKR
- Garmin and COROS watches
Stays on your phone
Your heart rate, workouts and profile are stored on your phone only. No account, and your health data is never shared.
Read the privacy policy