# World Clock vs Unichrono

The clearest difference is update cadence: Unichrono at every 5 days against World Clock's every 5 weeks. Unichrono also leads on device support (4 vs 2). World Clock's advantage is iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. World Clock sells 1 one-off in-app purchase and Unichrono sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

World Clock ships an update every 5 weeks, Unichrono every 5 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | World Clock | Unichrono |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Size | 41 MB | 34 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tomash Sugint](https://appshunter.io/developer/1896504334) | [Abhilash Emmanuel](https://appshunter.io/developer/6802869223) |

## What reviewers say

### World Clock

[App page](https://appshunter.io/ios/app/world-clock-timeshift/id6768507524)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TimeShift Pro | $3.99 | one-time |


### Unichrono

[App page](https://appshunter.io/ios/app/unichrono/id6804218446)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unichrono: World Clock Widget | $2.99 | one-time |


## Frequently asked questions

### Is World Clock free?

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

### Is Unichrono free?

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

### Do World Clock or Unichrono have ads?

Neither World Clock nor Unichrono shows ads.

### Which is updated more often, World Clock or Unichrono?

World Clock ships an update every 5 weeks, and Unichrono every 5 days. Most recently, World Clock was updated on October 31, 2026 and Unichrono on October 31, 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.*