After your Apple Watch hypertension alert

What the alert means

Apple Watch looks for patterns in its heart-sensor data that may suggest hypertension. It does not measure blood pressure. An alert is not a diagnosis.

Apple’s hypertension notification guidance suggests discussing the notification and your blood pressure measurements with your healthcare professional at your next appointment. Apple also prompts you to set up a log and use a third-party blood-pressure cuff to measure and track your blood pressure for seven days.

Apple page checked on November 10, 2026.

Measuring at home

This is the preparation used in CuffWeek, based on Hypertension Canada, Supplemental Table S1 and the American Heart Association (AHA). The one-hour caffeine and tobacco interval comes from Hypertension Canada.

• Avoid caffeine and tobacco for one hour beforehand, and exercise for 30 minutes beforehand. Empty your bladder first.
• Rest quietly, seated, for five minutes with your back supported, feet flat and legs uncrossed.
• Use a validated upper-arm monitor and the correct cuff size. Put the cuff on your bare arm following its instructions. Support your arm at heart level.
• Do not talk or use your phone during rest or measurement.
• Take two readings one minute apart, morning and evening. Record both.

Follow your prescribed medication schedule; ask your doctor how to fit measurements around it.

Bring the log to your doctor

Check with your doctor about your readings and bring your log to your appointment.

A very high reading or symptoms

CuffWeek flags systolic readings above 180 mmHg or diastolic readings above 120 mmHg, following the AHA.

The AHA recommends waiting at least one minute and measuring again. If the reading is still this high, contact your doctor immediately.

If you have chest pain, shortness of breath, back pain, numbness or weakness, a change in vision, or difficulty speaking, call 911 now. Do not wait for another reading.

How CuffWeek helps

CuffWeek keeps your cuff readings together, guides sessions, and prepares a PDF or CSV summary you choose to share with your doctor. Your first seven-day log is free. The app does not measure blood pressure, diagnose conditions, or recommend treatment or medication.

CuffWeek will be on the App Store soon.

Privacy

CuffWeek needs no account and uses no analytics, advertising, or trackers. Nothing is sent to us.

Your logs and readings are stored only on this device and, if you allow it, in Apple Health. CuffWeek does not sync health data to iCloud.

Exports leave CuffWeek only when you share them. You choose who receives them. Read the privacy policy.