Pressure: for reference, no coloured verdicts

The only reading without any health norm. So the device shows the number and the three-hour trend, but never colours it yellow or red.

Which numbers are normal

The zones on the device screen. Colour appears only where attention is needed.

a drop of 3–4 hPa in 3 hours	noted in words
any value	no colour

there is no health norm; Okuma et al. 2015 — swings of 6–10 hPa per day were associated with migraine, but that is not a standard

Real frames from the device, captured on 4 September 2026.

In 1.5 million patients no link was found between rain, pressure and joint pain. The link with migraine is weak and does not replicate from study to study.
A person notices a sharp change from 2–5 hPa; ordinary indoor swings are ten times below that threshold.
Why measure it then: pressure is needed to compute CO₂ correctly (the sensor depends on it) and to see where the weather is heading.
We say plainly that the evidence is weak. That is not a flaw of the device but its scientific honesty.

Jena et al. BMJ 2017; Okuma et al. SpringerPlus 2015

Hints in words on the screen. Actions about the room, not about the body.

“Pressure is falling” — when it drops 3–4 hPa in three hours: usually rain or wind on the way.
Nothing about how you feel. The device does not know, and does not pretend to.

What about magnetic storms?
No mechanism of effect on people has been found; correlations are weak and inconsistent. The device does not show them.