Mercu
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How to Keep a Home Blood Pressure Log for Your Doctor on iPhone
Short answer. Measure twice in the morning and twice in the evening for seven days with a validated cuff, and write every reading down with the time. Mercu does this on iPhone: you type the three numbers from your cuff, it tracks the week and makes a PDF report your doctor can read at a glance.
Step by step
- Sit for five minutesSit with your back supported, feet flat, arm resting at heart level. No coffee or exercise in the 30 minutes before.
- Take two readingsMeasure, wait one minute, measure again. Do it in the morning before medicine and in the evening before bed.
- Add them in MercuTap Add reading, set systolic, diastolic and pulse on the three wheels and save. Add context like Before meds if it applies.
- Share the reportOpen Report for your doctor, choose 7, 30 or 90 days, tap Create PDF and share it by Mail, Messages, AirDrop or print it.
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
What should the report include?
The average, morning and evening averages, highest and lowest reading, and every reading with date and time. Mercu's PDF has all of these.
Do I need Mercu Plus for the PDF?
Yes, the PDF report is part of Mercu Plus ($6.99/month with a 3-day free trial). Logging readings is free.
Related guides
- How to Average Home Blood Pressure Over 7 Days
- Is There an iPhone App That Measures Blood Pressure? What Works Instead
- 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.