Hey Siri, calm me down.
Sereo is the breathing coach you never have to look at: start with your voice or one tap on Apple Watch, then follow gentle haptics through a Calm, Focus, or Sleep session.
Built for the first breath
Most breathing apps make you watch an animation. Sereo can guide you by feel, so you can close your eyes.
Voice start
Built-in Siri phrases include the app name, such as "calm me down with Sereo." The shorter phrase takes a one-time Shortcuts setup.
Apple Watch first
A watch-face "Breathe" complication can launch a Calm session on your wrist with live heart rate and haptics.
Relative settling score
After a session, Sereo shows a relative guide derived from your heart-rate trend. It is not clinical HRV or a medical measurement.
Live heart rate, watch haptics, and the richest screen-free flow require a paired Apple Watch. Phone-only sessions keep the screen on and use phone haptics.
Your session stays yours
Sereo has no accounts, no server, and no third-party analytics. Heart-rate data and session history stay on your device.
- HealthKit: used on-device during sessions.
- Subscriptions: processed by Apple's App Store.
- Reminders: scheduled locally on your device.