How it Works
How It Works
Health tracking that fits into your day, not the other way round
Built to be forgotten
There's no display to check, no buzzing notifications, nothing pulling your attention back to your wrist every few minutes.
BND One reads your heart rate, sleep, and stress quietly in the background, and turns it into a picture of your day you only look at when you choose to.
More ways to understand your body.
Sleep
Time in bed only tells half the story. BND One reads your heart rate and movement overnight to split your sleep into REM, deep, light, and awake stages, then scores the result so you can compare nights and see what actually helps.
Blood Pressure
Continuous systolic and diastolic trend estimates through the day, measured optically at the wrist. Calibrate once against a baseline reading and the app maps patterns tied to meals, stress, and rest automatically. These are wellness trend estimates, not diagnostic-grade measurements.
Heart Rate
Your resting heart rate is one of the clearest signs of how your body is handling stress, illness, or training load. BND One tracks it around the clock and gives you a live reading in seconds whenever you check.
HRV
The gaps between heartbeats say more about recovery than how you feel on a given morning. A rising trend usually means you've bounced back; a dip is a signal to ease off.
Stress
Measured across four bands (relaxed, normal, elevated, high) with daily averages so you can see when things spiked, how long it lasted, and start noticing what triggers it.
Blood Oxygen
SpO2 tracked through the day, showing how efficiently your heart and lungs are getting oxygen where it needs to go, and flagging when a reading drops outside your normal range.
Finally track more
and charge less.
Most trackers need a nightly charge, which means a gap in your sleep data and one more thing to remember before bed. BND One runs for weeks on a single charge, so the tracking never has to stop.
Uncover your full blood pressure risk
BND One measures blood pressure continuously at the wrist using optical sensors and pulse transit time. Calibrate once against a baseline reading, then it tracks quietly day and night, building hourly averages and daily patterns in the app.
BND One provides estimated blood pressure trend data for general wellness purposes only. It has not been evaluated or cleared by any medical regulatory authority, is not a substitute for a validated blood pressure cuff, and should not be used to diagnose, monitor, or manage hypertension or any medical condition. Always confirm readings with a clinically validated device and consult a healthcare professional for medical decisions.
Take a closer look.
Own your BIOBND journey
From the moment you put it on, BND One starts measuring sleep, heart rate, and stress. Calibrate once against a baseline reading and your blood pressure trends begin building day and night from there.
Buy nowBND One is built for continuous, everyday wellness tracking, not clinical use. It is a wellness device and is not intended to diagnose, treat, cure, or prevent any disease.