From your wrist to plain words
While you sleep, your watch writes it down.
Apple Watch can record sleep, HRV — the small changes in time between heartbeats — wrist temperature and breathing rate while you sleep. Apple works out resting heart rate separately, from readings taken in the background while you are awake. What is available depends on your Watch model, settings and permissions. The records stay in Apple Health.
Last night, beside what’s usual for you.
Perigee compares last night with your own recent weeks, not a population average. Each reading says whether there are enough nights for a clear comparison, whether the Watch caught only part of the night, or whether more nights are needed.
Wake up to a clear summary.
A few clear sentences tell you what changed, what happened on the same night, and one practical thing you might do next. Choose to have the summary written online, or keep the whole process on your iPhone.
Your wrist temperature was warmer than usual last night. HRV — the small changes in time between heartbeats — was lower, and you also logged broken sleep. A hot, restless night likely contributed to this combination. Keep today lighter and note whether it repeats tonight.
What leaves your device — and what never does
Calculated numbers, the details needed for that summary and random codes used to check your plan and limits. Exactly what is sent depends on the feature.
Your name, email, raw Apple Health records or notes you type
Your watch records the night. Read it back.
Free to download · Plus price and any eligible introductory offer appear in Apple’s purchase sheet