CoolGuard

Heat is the #1 enemy of your phone's battery. See your phone's heat level at a glance and cool it down before the damage is done.

Heat is the #1 enemy of your phone's battery. CoolGuard tells you when your phone is heating up – so you can cool it down before the damage is done.

• LIVE HEAT LEVEL – see your phone's official thermal level (Normal / Slightly warm / Hot / Critical) at a glance, with clear color coding. • HEAT MAP – CoolGuard remembers where your phone overheats: in the car, on the charger, at the beach. Spot the patterns, fix the habits, save your battery. • LOCK SCREEN & DYNAMIC ISLAND – with the Heat Map's live display you see the current level without unlocking your phone. • ALERTS – get a notification (and an optional escalating beep) the moment your phone steps up a heat level. • WEATHER AWARE – outdoor temperature and today's maximum, with a heads-up on high-risk hot days. • WIDGETS – Home Screen and Lock Screen widgets with the latest level. • COOLING PICKS – curated active-cooling recommendations, from budget to premium.

Private by design: no ads, no analytics, no accounts. Your heat log never leaves your phone.

Note: iOS doesn't expose exact temperatures to apps – CoolGuard shows Apple's four official thermal levels.