Mercu
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Is There an iPhone App That Measures Blood Pressure? What Works Instead
Short answer. No App Store app can measure blood pressure with the camera or a fingertip — you need a cuff. The reliable setup is a validated home cuff plus a diary app such as Mercu, which records the readings, averages them and creates a report.
Step by step
- Get a validated cuffChoose an upper-arm cuff from a pharmacy; look for clinical validation.
- Record each readingIn Mercu tap Add reading and enter systolic, diastolic and pulse; Bluetooth cuffs can send readings through Apple Health.
- Watch the average, not single numbersMercu's Week screen shows your running home average and the range it falls in on the AHA or ESC scale.
Download Mercu on the App Store
Free to download on the App Store.
Mercu vs other apps
Prices checked on the App Store in October 2026.
| App | Price | Good at | Limits |
|---|---|---|---|
| Mercu | Free to log readings; Plus $6.99/month (3-day free trial) or $29.99/year | 7-day home protocol (2 morning + 2 evening readings, day 1 left out) with a final average; doctor PDF and CSV made on the phone; Apple Health read-only import that skips duplicates; works offline, no account | Does not measure blood pressure; no Apple Watch app; no cloud sync between devices; one diary per phone |
| Blood Pressure Monitor SmartBP | US App Store, Oct 2026: $5.99/week, $14.99/month, $39.99/year, $99.99 lifetime | Long track record, Apple Watch and iPad apps, Apple Health sync | Paywall at first launch; no guided 7-day protocol average |
| BP diary (self-monitoring) | Free | Free, simple diary with chart and PDF by e-mail | Rarely updated; no protocol average or Health import |
| Blood Pressure Log and Tracker | Free with subscription (prices not shown on the store page, Oct 2026) | Reads a cuff display with the camera, Apple Watch, many extras | Reviewers mention report sharing problems and feature overload |
Frequently asked questions
Do apps that 'scan your finger' work?
They estimate pulse at best; reviewers often report wrong or made-up blood pressure numbers.
Related guides
- How to Keep a Home Blood Pressure Log for Your Doctor on iPhone
- How to Average Home Blood Pressure Over 7 Days
- How to Get Omron or Withings Readings From Apple Health Into a Doctor Report
Download Mercu on the App Store
Free to download on the App Store.