# CoolGuard vs WhyMyPhone

The clearest difference is update cadence: WhyMyPhone at every 2 days against CoolGuard's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CoolGuard sells 3 one-off in-app purchases and WhyMyPhone sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CoolGuard ships an update weekly, WhyMyPhone every 2 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | CoolGuard | WhyMyPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/coolguard/id6801791826/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free | — |
| Size | 7 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Norbert Pentek](https://appshunter.io/developer/1884922906) | [极客学院](https://appshunter.io/developer/1545124828) |

## What reviewers say

### CoolGuard

[App page](https://appshunter.io/ios/app/coolguard/id6801791826)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small tip | $0.99 | one-time |
| Medium tip | $2.99 | one-time |
| Large tip | $9.99 | one-time |


### WhyMyPhone

[App page](https://appshunter.io/ios/app/whymyphone-phone-diagnostics/id6812444814)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $2.99 | one-time |


## Frequently asked questions

### Is CoolGuard free?

CoolGuard is free to download, with in-app purchases available.

### Is WhyMyPhone free?

WhyMyPhone is free to download, with in-app purchases available.

### Do CoolGuard or WhyMyPhone have ads?

Neither CoolGuard nor WhyMyPhone shows ads.

### Which is updated more often, CoolGuard or WhyMyPhone?

CoolGuard ships an update weekly, and WhyMyPhone every 2 days. Most recently, CoolGuard was updated on November 10, 2026 and WhyMyPhone on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*