# CoolGuard vs SleepCall

The clearest difference is iOS requirement: CoolGuard at 17.0 against SleepCall's 27.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. CoolGuard sells 3 one-off in-app purchases and SleepCall sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

CoolGuard ships an update weekly, SleepCall every 5 days. Both last shipped on November 10, 2026.

## The numbers

| Metric | CoolGuard | SleepCall |
| --- | --- | --- |
| 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 5 days** |
| Monetization | Free | — |
| Size | 7 MB | 24 MB |
| Requires iOS | **17.0** | 27.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Norbert Pentek](https://appshunter.io/developer/1884922906) | [Ilwolobongdo](https://appshunter.io/developer/6818906456) |

## 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 |


### SleepCall

[App page](https://appshunter.io/ios/app/sleepcall-call-timer/id6818906454)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepCall PRO Monthly | $1.99 | per month |


## Frequently asked questions

### Is CoolGuard free?

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

### Is SleepCall free?

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

### Do CoolGuard or SleepCall have ads?

Neither CoolGuard nor SleepCall shows ads.

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

CoolGuard ships an update weekly, and SleepCall every 5 days. Most recently, CoolGuard was updated on November 10, 2026 and SleepCall on November 10, 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.*