Heatwise: Phone Heat Monitor

Phone hot? Heatwise tells you if it is a problem, whether it is safe to charge and how to cool it down. Geeky details shows every raw signal iOS gives.

Your phone is hot. Heatwise tells you if that is a problem and what to do about it, using the thermal state iOS itself reports.

ONE SCREEN, THREE ANSWERS

• How hot it is: Cool, Warm, Hot or Too hot, straight from iOS • Whether it is safe to charge right now • Whether iOS is slowing it down

COOL IT DOWN

When it runs hot, Heatwise gives you a short checklist in the order that works: unplug the charger, close the heavy app, take the case off, get it out of the sun, turn on Low Power Mode. The charger and Low Power Mode tick themselves, because iOS reports them. A timer shows how long it has been hot and tells you when it is back to normal.

GEEKY DETAILS

A second tab for people who want the raw numbers: every signal iOS hands an app with its API name, a timeline of the session, time spent in each state, a log of every change and device info.

WIDGETS

Home Screen and Lock Screen widgets show the state at a glance. A Control Center button opens the app.

WHY THERE ARE NO DEGREES

Apple does not let apps read the temperature sensors in an iPhone. An app that shows 41 °C worked that number out from something else. Heatwise shows the real signal iOS uses to slow the chip and dim the screen, in its four real steps.

GOOD TO KNOW

iOS pauses apps in the background, so Heatwise reads your phone while it is open. Open it when the phone feels warm.

Nothing leaves your phone. No account, no analytics, no network connection.

Runs on iPhone and iPad with iOS 16 or later.