# ROMmeasurer Lite vs CoolGuard

The clearest difference is in-app purchases: ROMmeasurer Lite at none against CoolGuard's 3. ROMmeasurer Lite also leads on iOS requirement (8.0 vs 17.0). CoolGuard's advantage is update cadence (weekly vs every 8 months). On price, ads and device support there is nothing between them.

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

ROMmeasurer Lite ships an update every 8 months, CoolGuard weekly. Both last shipped on September 18, 2026.

## The numbers

| Metric | ROMmeasurer Lite | CoolGuard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coolguard/id6801791826/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | — | Free |
| Size | 7 MB | 7 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Kawakami](https://appshunter.io/developer/721449462) | [Norbert Pentek](https://appshunter.io/developer/1884922906) |

## What reviewers say

### ROMmeasurer Lite

[App page](https://appshunter.io/ios/app/rommeasurer-lite/id735862901)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is ROMmeasurer Lite free?

ROMmeasurer Lite is free to download, with no in-app purchases.

### Is CoolGuard free?

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

### Do ROMmeasurer Lite or CoolGuard have ads?

Neither ROMmeasurer Lite nor CoolGuard shows ads.

### Which is updated more often, ROMmeasurer Lite or CoolGuard?

ROMmeasurer Lite ships an update every 8 months, and CoolGuard weekly. Most recently, ROMmeasurer Lite was updated on September 18, 2026 and CoolGuard on September 18, 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.*