CoolGuard

CoolGuard

Heat Monitor, Clock & Alarm

1 ratings
Free
In-App Purchases

Rating summary
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Details

  • Released
  • Updated
  • August 18, 2026
  • September 16, 2026

Features

Background Location Access

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About

This app monitors your phone's temperature, providing real-time heat levels and alerts to prevent performance issues and battery aging. It also functions as a customizable night clock with alarms and displays local weather information.

Live heat level monitoring
Heat trend and log with map
Customizable alerts and cooling tips
Night clock with sleep mode
Multiple alarms with system integration
Outdoor weather display
Lock screen and Dynamic Island widgets
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What's New in CoolGuard

1.3.1

September 16, 2026

Alarm fix • Fixed: an alarm you never stopped — for example when an alarm in the Clock app set for the same minute covered it — could go off again at midnight. The alarm now gets its own full-screen view with a Stop button, the app closes an unstopped alarm on its own after 5 minutes, and the Alarms screen reminds you not to set an alarm for the same time in another app. What's new in 1.3: • Sleep Mode: dark screen with just the clock and the outdoor temperature — size and color in Settings. In landscape, the clock sits in the center, the temperature and the next alarm in the corners, with a vertical brightness slider • Alarms on the landscape clock tile: up to 10, with daily repeat, ringing through the system alarm — even when your phone is on silent • Keep Awake with a brightness slider on the nightstand; if the phone gets warm, it pauses on its own • Burn-in protection: slow pixel drift and dimming while the screen stays awake • Sun and moon around the ring: shows where the day stands, from sunrise to sunset • Landscape orientation on the main screen: the ring on the left, the tiles on the right, plus a clock tile • Weather tile: current temperature, today's low and high — tap the ring to see tomorrow's too • The advice tile can be dismissed — the heat level indicator then moves next to the ring • New widget in two layouts: thermometer, weather, battery, clock — the medium size adds the heat trend and the date • Heat Trend in two styles: Banded or Clean • 12- or 24-hour clock, with seconds if you like • Send Feedback with a single tap, by email • Proofread translations in all 50 languages Thanks for your feedback — it's shaping the app!

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In-App Purchases

$0.99

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Developer apps

FAQ

Does CoolGuard have ads?

No, CoolGuard is designed to be private by design and does not contain any advertisements. It also does not use analytics or require accounts, ensuring your data remains on your device.

How does CoolGuard monitor phone heat?

CoolGuard displays Apple's four official thermal levels (Normal, Slightly Warm, Hot, Critical) on the main screen. It provides live heat levels, trend curves, and a heat log with calendar and map integration.

What are the night clock features of CoolGuard?

In Sleep Mode, CoolGuard displays a dark screen with the clock and outdoor temperature in your chosen size and color. It includes burn-in protection with slow pixel drift and dimming, and supports 12- or 24-hour formats.

Can CoolGuard's alarms ring when the phone is silenced?

Yes, on iOS 26 and later, CoolGuard's alarms ring through the system alarm, even when your phone is silenced. You can set up to 10 repeating daily alarms.

What weather information does CoolGuard provide?

CoolGuard shows the outdoor temperature, including today's and tomorrow's highs and lows. It also features a weather face on the ring that visually represents the sun and moon's travel from sunrise to sunset.

Is CoolGuard available on multiple devices?

Yes, CoolGuard is supported on both iPhone and iPad devices. It offers widgets that work on the Lock Screen as well.

How often is CoolGuard updated?

The latest version of CoolGuard is 1.3.1, which was last updated on September 16, 2026. This indicates a relatively recent update, suggesting ongoing development and support.

What is the age rating for CoolGuard?

CoolGuard has an age rating of 4+, making it suitable for a wide range of users. The app is free to download and use.