Devices
Connect the beat source
We request the narrowest scopes that make the product work: heart rate, HRV, cadence. No location, no microphone, no contacts. Every scope is listed before you approve it and revocable afterwards.
Apple Watch
Apple Health · HealthKit
Typical accuracy ±3 bpm against a chest-strap reference.
- heart_rate
- hrv
- workout
- cadence
Fitbit
Fitbit Web API
Typical accuracy ±4 bpm against a chest-strap reference.
- heartrate
- activity
- sleep
Chest strap
BLE heart-rate profile
Typical accuracy ±1 bpm against a chest-strap reference.
- ble_heart_rate
No device yet
Manual entry
Typical accuracy ±8 bpm against a chest-strap reference.
- manual_entry