Your phone can read your vitals off your face.
Every heartbeat pushes blood into your skin and changes its color by a fraction no eye can see. The front camera picks that up thirty times a second. Forty seconds later you have a reading, and by the end of the week you have a trend.
The same method the camera-pulse research uses.
The app averages the color of your forehead and both cheeks, separates the pulse from the lighting and your movement, and reads the rate off it. Three patches rather than one, because the forehead is found from the eyebrow landmarks and the cheeks from the eyes and nose, and averaging them roughly halves the noise of any one.
- 01
Find some light
Face a window or a lamp. The screen turns itself up and its white ring becomes the lamp when the room is dim, but daylight on your face is what a clean read wants.
- 02
Sit still for forty seconds
Bring your face into the oval and hold it there. The ring fills as the recording runs, the live number firms up, and the trace under it shows what the camera is actually seeing.
- 03
Breathe with the glow
In for five, out for five. Six breaths a minute is where heart-rate variability is conventionally measured, and following the pacer is what makes the breath response readable.
- 40seconds, sitting stillthe whole habit, in the same light each morning
- 30frames a secondthe color shift each heartbeat leaves in your skin
- 6numbers reportedeach explained, each stored with its signal quality
Six numbers, each one explained.
Every figure the scan reports says what it is, how it was read and what it does not mean. Nothing here is a diagnosis of anything: a camera read in a kitchen is a wellness measurement, and it is stored as one.
- Heart rateBeats per minute while you sat still. A resting number to compare morning to morning: it settles lower with rest and fitness and climbs with strain, illness, caffeine and heat.
- Heart-rate variability, three waysRMSSD, SDNN and pNN50, from the gaps between beats. Gated hardest of everything the scan reports, because they are the noisiest, and withheld rather than guessed when the signal is short.
- Breathing rateBreathing slowly sways the whole pulse signal at the breathing rate, and that sway is read off the same trace. Six a minute during a paced scan means you followed the pacer.
- Breath responseHow far your heart rate rises and falls with each slow breath: a direct read on vagal tone, and the steadiest figure a camera can give because the breath timing is known.
- Signal qualityThe share of the recording that carried a clean pulse, shown live while you scan and stored with the reading, so a poor read is labeled as one rather than filed as fact.
- Your Watch, beside itWhen an Apple Watch was on and Health access is on, its heart rate from the same minute sits beside the scan. When the two agree the camera earned its number; when they differ, trust the wrist that day.
The one measurement that takes no device at all.
Which is what makes it the one you will actually do every day. Done at the same time each morning, in the same light, the trend is the point, not any single number. Your resting heart rate creeping up across a week says something a single reading cannot.
- A reminder at the time you choose, and a streak that shows on Today.
- Every scan kept with its signal quality, so a bad read never poisons the trend.
- Your Apple Watch reading from the same minute, beside the scan, when you wear one.
A chest strap is far more precise than any camera. What the scan is good at is the same reading every morning, with nothing to charge and nothing to wear.
Forty seconds tomorrow morning. That is the whole habit.
Join the list and the scan is waiting the day your invite arrives.
Launching in October
Launching in October