Turn on Apple Health sharing in the iHealth MyVitals app, then allow FourNumbers to read Blood Pressure and Heart Rate. Readings from iHealth then come into FourNumbers on their own.
How FourNumbers gets your readings
- From Apple Health, automatically. FourNumbers only reads blood pressure and pulse from Apple Health. It never writes or changes anything there.
- Take a photo of your monitor's screen.
- Type it in.
It works with any upper-arm or wrist cuff.
Step 1: Turn on sharing in iHealth MyVitals
- Tap Account (bottom right).
- Under DATA, tap Authorize 3rd Party Apps.
- Tap Apple Health > Authorize > Done.
The button then says "Unauthorize" — use it if you want to disconnect. The app may also offer this while you create your account.
Step 2: Let FourNumbers read Apple Health
Open FourNumbers and allow Blood Pressure and Heart Rate when iOS asks for Apple Health access.
To check later: iPhone Settings > Apps > Health > Data Access & Devices (or Health app > your profile picture > Privacy > Apps).
Tips
- Use the current iHealth MyVitals app, not the older legacy iHealth app.
- If readings don't appear, open the Health app > profile picture > Privacy > Apps > iHealth MyVitals and make sure Blood Pressure is turned on.
How FourNumbers helps
Your readings show up in FourNumbers next to your meals and medications. You can also snap a photo of your monitor or type a reading in anytime.
Download on iPhoneQuestions people also ask
Steps from iHealth's support center (support.ihealthlabs.com).
Related guides
- Use any blood pressure cuff with FourNumbers
- How do I get an accurate blood pressure reading with my cuff?
- How do I keep a blood pressure log for my doctor?
Last checked: October 2026. Menu names can change when brands update their apps.