Comparison

CoolGuard vs Crager

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CoolGuard

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.

Highlights
  • 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
Features
Read full description

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.

About

Crager

Features
Read full description

Crager - приложение для управления совместимыми зарядными устройствами по Bluetooth. Подключите зарядку, чтобы видеть текущие показания и изменять параметры прямо с iPhone или iPad. Возможности: - Просмотр входного и выходного напряжения, тока и мощности. - Контроль температуры, частоты, накопленных Ah и Wh. - Настройка тока, напряжения и других параметров зарядного устройства. - Включение и выключение выхода. - Установка и смена пароля, включение и отключение парольной защиты. - Ручное сохранение выбранного устройства для автоматического подключения при следующем запуске. - Светлая и тёмная темы. Показания автоматически обновляются во время работы приложения. Изменение параметров проверяется повторным чтением данных с зарядного устройства. Для работы требуется совместимое зарядное устройство с Bluetooth. Доступные параметры и показания зависят от его прошивки.

Screenshots

CoolGuard4 screens
Crager3 screens

Verdict

The call

The clearest difference is in-app purchases: Crager at none against CoolGuard's 3. Crager also leads on update cadence (every 2 days vs weekly) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CoolGuard sells 3 one-off in-app purchases. Crager asks for nothing beyond the download.

UpkeepUpdate frequency

CoolGuard ships an update weekly, Crager every 2 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
CoolGuard versus Crager: the parameters behind the verdict, then further details
ParameterCoolGuardCrager
PriceFreeFree
Rating4.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size7 MB3 MB
Age rating4+4+
DeveloperNorbert PentekUladzislau Hliavitski

In-app purchases

3 purchases

CoolGuard

One-time3
  • Small tip$0.99
  • Medium tip$2.99
  • Large tip$9.99
None

Crager

No in-app purchases

Questions

Is CoolGuard free?
CoolGuard is free to download, with in-app purchases available.
Is Crager free?
Crager is free to download, with no in-app purchases.
Do CoolGuard or Crager have ads?
Neither CoolGuard nor Crager shows ads.
Which is updated more often, CoolGuard or Crager?
CoolGuard ships an update weekly, and Crager every 2 days. Most recently, CoolGuard was updated on October 23, 2026 and Crager on October 24, 2026.

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