# uWorld vs Moon Clock

The clearest difference is in-app purchases: uWorld at none against Moon Clock's 1. uWorld also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Moon Clock sells 1 one-off in-app purchase. uWorld asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | uWorld | Moon Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 69 MB | 78 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [浩安 王](https://appshunter.io/developer/909352928) | [YI-WEN CHOU](https://appshunter.io/developer/6799608432) |

## What reviewers say

### uWorld

[App page](https://appshunter.io/ios/app/uworld-world-clock-widget/id909352925)

Easily track time across different global regions with this intuitive utility. It automatically converts times to your local zone and allows quick calendar entries, with a convenient notification center widget for instant access.

**Highlights:** Global time zone tracking, Automatic time conversion, Calendar event integration, Notification center widget, Simple user interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Moon Clock

[App page](https://appshunter.io/ios/app/moon-clock-phases-and-widgets/id6799608430)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moon Clock Pro | $5.99 | one-time |


## Frequently asked questions

### Is uWorld free?

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

### Is Moon Clock free?

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

### Do uWorld or Moon Clock have ads?

Neither uWorld nor Moon Clock shows ads.

### Which is updated more often, uWorld or Moon Clock?

uWorld ships an update every 6 weeks, and Moon Clock every 6 weeks. Most recently, uWorld was updated on November 1, 2026 and Moon Clock on October 24, 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.*