# CoolGuard — Heat Monitor, Clock & Alarm > Phone heat monitor, night clock, alarm, and weather utility. (iPhone/iPad app by Norbert Pentek.) - Source: https://appshunter.io/ios/app/coolguard/id6801791826 (this page in markdown: same URL + `.md`) - Developer: [Norbert Pentek](https://appshunter.io/developer/1884922906) - Category: Utilities, Weather - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 7 MB - Languages: American English, Amharic, Arabic, Bangla, Burmese, Khmer, Catalan, Croatian, Czech, Danish and 39 more - Released: 2026-08-18 - Data updated: 2026-09-18 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/coolguard/id6801791826/reviews.md ## What is CoolGuard? CoolGuard keeps an eye on your phone's heat — and at night, it's the clock on your nightstand. A hot iPhone runs slower, its battery ages faster, and in summer it heats up within moments in the sun or while gaming, navigating, or charging. CoolGuard shows you where your phone stands on a four-level scale (Normal, Slightly Warm, Hot, Critical), warns you in time, and tells you what to do. HEAT MONITORING • Live heat level on the main screen, with a color-coded ring and a quick tip • Heat Trend: 1-hour and 24-hour curves in a banded or clean style — drag your finger to read the details • Heat Log with calendar and map: when and where your phone got hot • Alerts from the level you choose: push notifications, sound alerts, quiet hours • Monitor Mode: background monitoring, with a Live Activity on the Lock Screen and in the Dynamic Island • Cooling tips and a carefully curated selection of active coolers NIGHT CLOCK AND ALARM • Sleep Mode: dark screen with just the clock and the outdoor temperature — three sizes, your choice of color • Alarms: up to 10, repeating daily; on iOS 26 and later they ring through the system alarm, even when your phone is silenced • Landscape view: big clock, swipeable alarm bar, brightness slider • Burn-in protection: slow pixel drift and dimming to keep your display safe • 12- or 24-hour clock, with seconds if you like WEATHER • Outdoor temperature, with today's and tomorrow's highs and lows • Weather face in the ring: the sun and moon travel around it from sunrise to sunset • A warning on dangerously hot days WIDGET • Small: thermometer, weather, battery level, clock • Medium: adds the heat trend curve and the date • Works on the Lock Screen, too BATTERY • Battery Health and cycle count, compared month by month with your phone's heat MORE • 50 languages, Celsius or Fahrenheit • Private by design: no ads, no analytics, no accounts — your Heat Log never leaves your phone • Free — you can support development with a tip Note: iOS doesn't expose exact temperatures to apps — CoolGuard shows Apple's four official thermal levels. ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Small tip | $0.99 | one-time | | Medium tip | $2.99 | one-time | | Large tip | $9.99 | one-time | ## Frequently asked questions about CoolGuard ### 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. ## Version history (last 5 releases) ### 1.3.1 — 2026-09-16 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! ### 1.3 — 2026-09-14 Nightstand update! • 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! ### 1.2 — 2026-09-03 Big summer update! • New Heat Trend: scrub the chart with your finger, with a live glowing dot • Heat Calendar: every day colored by its hottest level • Weather circle: tap the Outdoor temperature card for conditions, current and daily high/low • Choose Celsius or Fahrenheit in Settings • The app now speaks 50 languages • Refreshed, unified look Thank you for the amazing downloads – your feedback drives every update! ### 1.1 — 2026-08-27 CoolGuard now speaks your language! • Fully localized in 34 languages • Localized App Store pages and screenshots • Smarter regional store links in Cooling Picks • Small fixes and polish Thank you for the amazing first week – your reviews and tips keep the updates coming! ### 1.0 — 2026-08-19 No release notes. ## More apps by Norbert Pentek - [Spirit](https://appshunter.io/ios/app/spirit/id6795014693) All apps by Norbert Pentek: https://appshunter.io/developer/1884922906 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-18.*