# Dieter Clock vs ONE WATCH

The clearest difference is in-app purchases: Dieter Clock at none against ONE WATCH's 3. ONE WATCH's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Dieter Clock ships an update every 3 weeks, ONE WATCH every 3 days. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Dieter Clock | ONE WATCH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 5 MB | 52 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Oguzhan Bilgin](https://appshunter.io/developer/1848626364) | [Johann Szebeni](https://appshunter.io/developer/1880746405) |

## What reviewers say

### Dieter Clock

[App page](https://appshunter.io/ios/app/dieter-clock/id6754521171)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Dieter Clock free?

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

### Is ONE WATCH free?

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

### Do Dieter Clock or ONE WATCH have ads?

Neither Dieter Clock nor ONE WATCH shows ads.

### Which is updated more often, Dieter Clock or ONE WATCH?

Dieter Clock ships an update every 3 weeks, and ONE WATCH every 3 days. Most recently, Dieter Clock was updated on October 1, 2026 and ONE WATCH on October 9, 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.*