How to Keep a Body Temperature Log on iPhone

Why people keep temperature logs

People keep a body temperature log for many everyday reasons: to have an organized personal record, to remember readings over a busy week, or to keep notes for themselves, their children, family members, or pets. A log is simply a record — it does not interpret your readings and is not a substitute for professional advice.

What to record

A useful entry captures enough context that it still makes sense later. For each reading from your thermometer, write down:

• Date — so entries stay in order over days and weeks.
• Time — readings can vary across the day, so the time adds helpful context.
• Reading — the temperature shown on your thermometer.
• Notes — anything that helps you remember the moment, like “after a walk” or “before bed.”

You can start right away with the free body temperature log template and print, copy, or download it.

Celsius vs Fahrenheit

Record whichever unit your thermometer shows. Consistency matters more than the unit itself — pick one and stick with it, or note the unit on each entry. If you ever need to switch, use the Celsius to Fahrenheit converter, and see Celsius vs Fahrenheit for body temperature for a short explainer.

Privacy tips

• Keep personal health records on your own device rather than shared documents.
• Use separate profiles for each person or pet so records stay organized and clear.
• With Temperature Checker, your entries are stored privately on your iPhone — no account is required and the website never stores your health data on a server.

Keep your history organized

As your log grows, a quick overview helps. The temperature log summary tool shows your highest, lowest, and average readings at a glance. For a long-term private history with profiles and notes, continue in the Temperature Checker app.