The science · Blood pressure

Follow your blood pressure trend

A blood pressure reading at the doctor’s captures a single moment. Bionny estimates your blood pressure through the day with an optical sensor on your wrist, without a cuff, so you can follow how it moves over weeks.

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Man on a sofa checking his blood pressure in the Bionny app

What the band tracks

Bionny app: blood pressure through the day

Woman looking at her Bionny band, with her systolic and diastolic values

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Why blood pressure is worth tracking

High blood pressure is one of the leading risk factors for heart disease and stroke. According to the World Health Organization, around 1.4 billion adults aged 30 to 79 were living with it in 2024, and fewer than 1 in 5 had it under control ¹.

Bionny estimates blood pressure with its optical sensor, which follows the pulse wave in your wrist, combined with your profile. It doesn’t squeeze your arm like a cuff, so a difference with a cuff monitor is expected. Estimates are most useful as a trend, and a change in your trend is a good reason to check with a validated cuff monitor and talk to your doctor. Bionny is a wellness device, not a medical device.

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Man on a sofa next to the Bionny Health monitor screen

Blood pressure questions

Can Bionny replace my blood pressure monitor?

No. Bionny’s estimates are for wellness trends. To monitor your blood pressure, use a validated cuff monitor and follow your doctor’s advice.

Why is it different from my cuff monitor?

The two devices measure in different ways, at different moments. A difference is normal; compare trends rather than single numbers.

How often is it measured?

Automatically at regular times through the day, plus whenever you start a measurement in the app.

One estimate was high. Should I worry?

One estimate isn’t a diagnosis. Repeat it seated and calm. If your trend stays high, or if you have symptoms, see a healthcare professional.

Are the first estimates accurate?

The band needs a few days to calibrate. Remove the thin protective film from the sensor, wear the band snugly, and focus on your trend over time rather than the very first estimates.

Why don’t my automatic measurements work?

Make sure you use the band with only one account, on one phone, and exclusively with the Bionny app. Check that you’ve removed the thin protective film from the sensor and that your app is up to date. If the problem continues, contact us through the app under Profile > Help & suggestions.

Is Bionny’s blood pressure clinically validated?

Bionny is a wellness device, not a medical device. Its blood pressure estimates are designed to help you follow your trend over time, not to replace a medical measurement. To monitor your blood pressure, use a validated cuff monitor and follow your doctor’s advice.