Log blood pressure, blood sugar and other readings

Write down readings and symptoms for the family and the doctor. The health log is part of Plus.

Written by the peaflow teamUpdated October 1, 2026

On Today, tap Log blood pressure, sugar or symptoms. Anyone in the circle can log, and everyone sees it.

Pick what to log, then type the reading
Pick what to log, then type the reading.

What you can log

What you enter
Blood pressure Top and bottom number, in mmHg
Pulse Beats per minute
Blood sugar mg/dL, and optionally fasting, before a meal, after a meal or bedtime
Weight lb or kg. peaflow also shows BMI; see BMI
Temperature °F or °C
Oxygen %
Symptom Dizziness, nausea, headache, a fall and more, how strong, and a note
Note Anything the doctor should hear

How to log

  1. Tap the kind of reading.
  2. Type the number. The whole box is tappable, and the unit sits beside the number.
  3. Choose Now, or Earlier today and the time.
  4. Tap Save.

Units start with your iPhone’s region (kg and °C outside the U.S.) and switch with one tap.

Written down as entered

peaflow records readings exactly as you type them. It doesn’t label a reading high or normal, compare it to a range, or link it to a medication. peaflow only checks that the number could be real, so a typo like 1280/82 is caught.

Logging readings is part of peaflow Plus. Your parent’s phone can always send symptoms with How I feel.