Blood Pressure (Beta)
Experimental systolic / diastolic estimate. Advanced (Beta), wellness-only.
Advanced (Beta) — wellness only
Blood pressure is an experimental estimate for general wellness use only. It is not a cuff replacement and must not be used for any medical decision. Render it at lower visual authority than Core metrics.
Definition
Blood pressure is the force of circulating blood against the artery walls, reported as two numbers in mmHg:
- Systolic — peak pressure during a heartbeat (
bloodPressure.systolicMmHg). - Diastolic — pressure between beats (
bloodPressure.diastolicMmHg).
neccessory estimates blood pressure from the shape of the recovered pulse. This is inherently approximate over a camera and is offered only as a coarse wellness indicator.
Range
| Value | |
|---|---|
| Commonly cited "normal" | ~120/80 mmHg |
Actual values vary widely by individual and context. Do not treat any camera-based estimate as a clinical reading.
Averaging window
Blood pressure needs an even cleaner, stiller capture than heart rate, because it
reads the fine shape of the pulse. In poor conditions it is returned as null.
Works when
- The subject is very still — stillness matters even more here than for heart rate.
- Lighting is even and the face is well framed and unobstructed for the full window.
Does not work when
- There is any noticeable motion, talking, or expression change.
- Lighting is dim, uneven, or flickering.
Confidence and result shape
In the measurement result, blood pressure lives under
bloodPressure, carries tier: "beta", a disclaimer string,
and a per-metric confidence (0..1). Values are nullable and may be absent from
a measurement.
See the full disclaimer.