# ONE WATCH vs TimeZone Expert

The clearest difference is in-app purchases: TimeZone Expert at none against ONE WATCH's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ONE WATCH sells 3 in-app purchases, starting at $2.99 per month. TimeZone Expert asks for nothing beyond the download.

ONE WATCH ships an update every 3 days, TimeZone Expert every 5 days. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | ONE WATCH | TimeZone Expert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 52 MB | 14 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Johann Szebeni](https://appshunter.io/developer/1880746405) | [Po-Han Chen](https://appshunter.io/developer/6785743236) |

## What reviewers say

### ONE WATCH

[App page](https://appshunter.io/ios/app/one-watch-timezone-clock/id6777670673)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $24.99 | per year |
| Premium Lifetime | $99.99 | one-time |


### TimeZone Expert

[App page](https://appshunter.io/ios/app/timezone-expert/id6785743234)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ONE WATCH free?

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

### Is TimeZone Expert free?

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

### Do ONE WATCH or TimeZone Expert have ads?

Neither ONE WATCH nor TimeZone Expert shows ads.

### Which is updated more often, ONE WATCH or TimeZone Expert?

ONE WATCH ships an update every 3 days, and TimeZone Expert every 5 days. Most recently, ONE WATCH was updated on October 9, 2026 and TimeZone Expert on September 30, 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.*