hrv.live shows recovery as it happens — not tomorrow morning.
True beat-to-beat RMSSD, pNN50, and RR intervals, live in your browser. No smoothing, no averaged score. If your autonomic system drops at 2:14pm, you see it at 2:14pm.
Built because wearables give you a green recovery score while you're overdrawn. Overnight averaging is the right tool for a nightly baseline. It's the wrong tool for the moment you're actually trying to measure.
How it works
Connect a chest strap over Bluetooth. Watch your time-domain signal live — RMSSD, pNN50, and the underlying RR intervals, updating in real time as you sit in front of it. See load, crash, and recovery in the same window, as they happen.
What it is not
Not wellness. Not a readiness score. A measurement tool for trading floors, performance labs, clinicians, and anyone operating under sustained cognitive or physical load who needs to see autonomic state in the moment, not the next morning.
Disclaimer
hrv.live, rmssd.com, and Time Domain Labs tools are for informational and educational purposes only. Not a medical device. Not FDA cleared or approved. No medical advice is provided.
We do not diagnose, treat, cure, or prevent any disease or medical condition. RMSSD, pNN50, and RR interval data are measures of autonomic activity, not a medical diagnosis.
Do not use this information to make medical decisions. Always consult a qualified healthcare professional for medical concerns. If you have a medical emergency, call 911.
You assume full responsibility for use of this site and its data.