# Time Zone Difference Planner vs World Clock

The clearest difference is in-app purchases: World Clock at none against Time Zone Difference Planner's 3. World Clock also leads on update cadence (monthly vs every 4 months). Time Zone Difference Planner's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Time Zone Difference Planner sells 3 in-app purchases, starting at $2.99 per 7 days. World Clock asks for nothing beyond the download.

Time Zone Difference Planner ships an update every 4 months, World Clock monthly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Time Zone Difference Planner | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Size | 5 MB | 4 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) | [Junpei Okumura](https://appshunter.io/developer/6773895881) |

## What reviewers say

### Time Zone Difference Planner

[App page](https://appshunter.io/ios/app/time-zone-difference-planner/id6772262657)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Clock Weekly | $2.99 | per 7 days |
| Remote Work Yearly | $14.99 | per year |
| UTC Converter Lifetime | $29.99 | one-time |


### World Clock

[App page](https://appshunter.io/ios/app/world-clock-time-zones/id6773895879)

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

**In-app purchases:** none


## Frequently asked questions

### Is Time Zone Difference Planner free?

Time Zone Difference Planner is free to download, with in-app purchases available.

### Is World Clock free?

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

### Do Time Zone Difference Planner or World Clock have ads?

World Clock shows ads; Time Zone Difference Planner does not.

### Which is updated more often, Time Zone Difference Planner or World Clock?

Time Zone Difference Planner ships an update every 4 months, and World Clock monthly. Most recently, Time Zone Difference Planner was updated on October 26, 2026 and World 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.*