Open the Health app on your iPhone
Tap Browse
Tap Heart
Tap Blood Pressure
Tap Add Data
Enter your systolic and diastolic readings
Tap Add
Use a compatible blood pressure cuff to measure your BP
Sync the reading with Apple Health if your cuff supports it
View your blood pressure history in the Health app
If you use a third-party BP app, install it from the App Store and connect it to Apple Health
Check whether your Apple Watch model supports the BP feature in your region
Follow any on-screen setup steps in the Blood Pressure app if available on your watch