T03 / HRV Breathing TrainerTrain your
Train your
vagal tone.
Guided breathing patterns to improve heart rate variability. 5 evidence-based protocols — box, 4-7-8, coherence, resonance, Wim Hof.
Free account
5 protocolsHaptic on iOSPre/post HRV
Choose a protocol
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Session complete
Rounds completed
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in this session
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paced
Pre/post HRV measurement and haptic feedback are available in the iOS app via Apple Health.
02 / How it works
3 steps.
01
Pick a protocol
Box breathing, 4-7-8, coherence (5.5 bpm), resonance, Wim Hof.
02
Follow the guide
Visual cue with timing. Haptic feedback on iOS. 1, 5, or 10 minutes.
03
See your delta
Pre- and post-session HRV from Apple Health (iOS app). Logged to your record.
03 / Features
What's included.
5 evidence-based breathing protocols
Visual cue with breath-pacing animation
Open-ended sessions, stop anytime
Haptic feedback on iOS (native app)
Pre/post HRV from Apple Health (iOS app)
Logged to your bio-age trajectory
04 / Try it
Start a 5-minute session.
Five protocols, evidence-based. Try one — see your HRV move.