# Global Time Machine vs RGB Test

The clearest difference is ads: Global Time Machine at none against RGB Test's shown. Global Time Machine also leads on update cadence (every 2 weeks vs every 8 months) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Global Time Machine ships an update every 2 weeks, RGB Test every 8 months. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Global Time Machine | RGB Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (7 ratings)](https://appshunter.io/ios/app/global-time-machine/id1082674619/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 8 months |
| Monetization | Free | — |
| Size | 8 MB | 5 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 9+ |
| Developer | [theMakeApp](https://appshunter.io/developer/1014975385) | [Zbigniew Osada](https://appshunter.io/developer/911447642) |

## What reviewers say

### Global Time Machine

[App page](https://appshunter.io/ios/app/global-time-machine/id1082674619)

Easily track the time in any city worldwide. Add locations to your list to plan international calls, meetings, or connect with loved ones abroad. Features DST support and quick access to nearby hours.

**Highlights:** Track time in over 20,000 cities, View nearby hours by scrolling, Convenient world clock interface, DST support for all locations, Shake to reset functionality

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

**In-app purchases:** none


### RGB Test

[App page](https://appshunter.io/ios/app/rgb-test/id1084158696)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Global Time Machine free?

Global Time Machine is free to download, with no in-app purchases.

### Is RGB Test free?

RGB Test is free to download, with no in-app purchases.

### Do Global Time Machine or RGB Test have ads?

RGB Test shows ads; Global Time Machine does not.

### Which is updated more often, Global Time Machine or RGB Test?

Global Time Machine ships an update every 2 weeks, and RGB Test every 8 months. Most recently, Global Time Machine was updated on October 16, 2026 and RGB Test on October 20, 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.*