# zChess Clock vs Flag

The clearest difference is in-app purchases: zChess Clock at none against Flag's 1. Flag's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | zChess Clock | Flag |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 2 MB | 51 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Zobrist](https://appshunter.io/developer/1511619762) | [Anton Voropaiev](https://appshunter.io/developer/1817040513) |

## What reviewers say

### zChess Clock

[App page](https://appshunter.io/ios/app/zchess-clock/id6754953115)

**In-app purchases:** none


### Flag

[App page](https://appshunter.io/ios/app/flag-chess-clock-and-timer/id6767051898)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flag Pro | $4.99 | one-time |


## Frequently asked questions

### Is zChess Clock free?

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

### Is Flag free?

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

### Do zChess Clock or Flag have ads?

Neither zChess Clock nor Flag shows ads.

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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.*