# Atomic Clock App vs World Clock 世界時鐘

The clearest difference is price: World Clock 世界時鐘 at Free against Atomic Clock App's $2.99. World Clock 世界時鐘 also leads on iOS requirement (13.0 vs 15.1). Atomic Clock App's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

World Clock 世界時鐘 is free to download; Atomic Clock App costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Atomic Clock App | World Clock 世界時鐘 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Size | 31 MB | 23 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gianfranco Antenucci](https://appshunter.io/developer/1875606849) | [fung ka wa](https://appshunter.io/developer/6778859454) |

## What reviewers say

### Atomic Clock App

[App page](https://appshunter.io/ios/app/atomic-clock-app/id6760158311)

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

**In-app purchases:** none


### World Clock 世界時鐘

[App page](https://appshunter.io/ios/app/world-clock/id6780769463)

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

**In-app purchases:** none


## Frequently asked questions

### Is Atomic Clock App free?

Atomic Clock App costs $2.99, with no in-app purchases.

### Is World Clock 世界時鐘 free?

World Clock 世界時鐘 is free to download, with no in-app purchases.

### Do Atomic Clock App or World Clock 世界時鐘 have ads?

World Clock 世界時鐘 shows ads; Atomic Clock App does not.

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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.*