The ring reads the shape of your pulse wave at the finger and tracks how your blood pressure moves across days and weeks. It is built to show you a trend against your own calibration — not to replace a cuff, and not to hand you a diagnosis.
Your evenings run higher than your mornings. The five days in the Elevated band or worse fell in one week, and all of them followed late training.
Systolic estimate · 30 days
116mmHg today · target below 120
Days in target
21 of 30
Elevated
4
Stage 1
1
Any one estimate carries error. A month of them, read against your own calibration, shows whether you are drifting up or coming down — and that is the question worth asking between clinic visits.
130 over 71 is Elevated, not normal. The band is taken from whichever of the two numbers sits higher, so a good diastolic never rescues a raised systolic. This is a deliberate correction to how the earlier app read the pair.
Band definitions follow the thresholds in common clinical use. The app shows your band; it does not interpret it for you.
Enter three measurements from a validated home or clinic cuff, taken at rest. These anchor the model to your own arteries rather than an average pair of them.
Pulse-wave shape, transit timing and heart rate are read together, then fitted against your anchors so the estimate has something real to stand on.
The app asks for a fresh cuff reading periodically, and whenever your resting physiology shifts enough that the fit is worth checking.
Pulse pressure — the gap between the two — is the one most people have never seen, and it moves with arterial stiffness over years rather than days.
Circular describes patterns in your own estimates. It does not diagnose hypertension and is not a substitute for a cuff or for clinical advice.
No. It tracks the direction your blood pressure is moving between cuff readings. Any decision about medication or treatment belongs to a validated cuff and a clinician.
To meet medical-grade clinical standards, a monitor must achieve a mean error of 5mmHg or less, with a standard deviation of no more than 8mmHg.
The Circular Ring 2 meets that however a lot depends on the calibration phase.
Here is all factors that can distort reading even with cuffs
1. Equipment & Technique Factors
2. Posture & Rest
Optical sensors read the shape and timing of your pulse, not pressure itself. The cuff readings tell the model what those shapes mean in your body — arteries differ enough between people that a generic mapping is not good enough.
The app prompts you, and asks sooner if your resting heart rate or temperature baseline shifts. Re-anchoring after a change in medication or a long illness is always worth doing.
It samples through the day and overnight, then reports a daily estimate with the spread around it. It is not a continuous read-out and does not claim to be one.
No. Blood pressure trends are included with the ring, permanently, like every other measurement.
Volgende
Calibrate once, wear it, and let the record build.
Leer jezelf kennen. De cirkel is rond.
Calibrate once, wear it, and let the record build.
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