Apple Watch
HRV Breathe for Apple Watch.
Guided breathing with your live heart rate on your wrist. Native watchOS app, reads the same SDNN samples Apple Health is already collecting. No phone needed.
Inhale
The pacer on your wrist.
Lift your wrist, tap once, follow the breath. Three minutes, five, or ten. Six breaths per minute is the default; six patterns total.
Sessions complete on the watch sync back to your iPhone automatically. Streaks, history, and HRV trends update in the background.
HRV stays on your device.
We read HRV from Apple Health to build your trend, and the readings taken around a session are stored on that session. All of it stays in your own Apple account — local on the device and synced through your private iCloud database. There is no server of ours in the path. There is no account to create. We never receive any of it.