7:40 AM · Calm · 18%
StressMonitor turns your Apple Watch heart rate into one calm number. See spikes as they happen, find out what set them off, and breathe back to calm in a minute.
How to read it
Stress % compares your heart rate right now with your own average from the last 60 days — not with a stranger's. Workouts and sleep are left out. Puff's sky shows the zone at a glance.
Calm0–24%
Clear skies. Your heart is close to its resting pace.
Balanced25–45%
Fair weather. Normal for a busy, focused day.
Tense46–75%
Clouds building. A good moment to pause.
High76–100%
Storm overhead. One minute of breathing helps.
A day with StressMonitor
Calm · 18%
Your Apple Watch already measures heart rate all day. StressMonitor reads it from Apple Health every 10 minutes and draws your day — stress, heart rate, HRV and resting heart rate, each against your own normal.
High · 78%
When stress jumps, StressMonitor checks what was going on — a workout, a short night, coffee, a skipped meal — and tells you the likely cause. Tag it in one tap and your patterns start to show.
Tense → Balanced
Eight guided breathing rhythms, from Long Exhale to 4-7-8 for Sleep, with gentle sounds. Afterwards you see what changed in your heart rate — and can save the minutes to Apple Health.
Winding down
A 0–100 sleep score from your watch's sleep data, with the stages that made it. With Plus, see how each night shapes the next day's stress.
Features
Every chart is compared with your own last 60 days, so a busy week reads as a busy week — for you.
Switch between stress, heart rate, HRV and resting heart rate. Each lens says whether you're above or below your usual — and gives one thing to try.
StressHRHRVRHR
Each day shows its average stress. Tap one to open that day's full report.
Spikes, calm stretches, sleep and workouts for the day you pick.
Open any HRV reading your Apple Watch took and see the heartbeats behind it.
With Plus, get a daily read-out in plain words and ask follow-up questions.
Why was Tuesday so tense?
Stress sat above your usual from 2 to 5 PM, after a 5 h 40 min night. Both spikes lined up with back-to-back calls. A short walk at lunch could help.
Sample answerWatch & widgets
Puff's sky changes with your stress, so one glance at your Home Screen, Lock Screen or wrist is enough. When the sky darkens, Breathe is one tap away.
Privacy
Heart rate, HRV, resting heart rate, sleep and workouts from Apple Health. Steps, caffeine and alcohol only if you allow them.
Mindful Minutes after a breathing session — and only when you switch it on.
Anonymous app analytics never include your stress, heart rate or spike notes.
Cloud AI is used only after you tap Allow. Otherwise explanations come from your iPhone.
No ads. No finger-on-the-camera tricks. StressMonitor is a wellness app, not a medical device.
Yes. StressMonitor reads the heart rate your Apple Watch records in Apple Health. Without a watch there's nothing to read — and it never measures with the camera.
It compares your heart rate in each 10-minute window with your own average from the last 60 days. Workouts, the recovery after them and sleep are left out, so a run doesn't count as stress.
No. It describes how your body is responding, for everyday wellness. It doesn't diagnose or treat anything. Talk to a doctor about any health worries.
Your health data stays on your iPhone and Apple Watch. Cloud AI only runs if you tap Allow, and analytics never include health data. The privacy policy has the details.
AI analysis with follow-up chat, patterns in what sets off your stress, 1-month and 3-month trends, and how sleep shapes the next day. Everything else is free.
For Plus Yearly, open Settings on your iPhone, tap your name, then Subscriptions, and choose StressMonitor Plus. Cancel at least 24 hours before the trial or year ends so you're not charged again. Plus Lifetime is a one-time purchase, so there's nothing to cancel.