# RapZap chess clock vs Modern Chess Clock

The clearest difference is in-app purchases: Modern Chess Clock at none against RapZap chess clock's 2. RapZap chess clock's advantage is iOS requirement (9.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RapZap chess clock sells 2 one-off in-app purchases. Modern Chess Clock asks for nothing beyond the download.

RapZap chess clock ships an update fortnightly, Modern Chess Clock every 10 days. Both last shipped on October 10, 2026.

## The numbers

| Metric | RapZap chess clock | Modern Chess Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (6 ratings)](https://appshunter.io/ios/app/rapzap-chess-clock/id698997453/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 5 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Mattheus](https://appshunter.io/developer/698997461) | [Nurullah Bilgin](https://appshunter.io/developer/1638320664) |

## What reviewers say

### RapZap chess clock

[App page](https://appshunter.io/ios/app/rapzap-chess-clock/id698997453)

A simple and easy-to-use timer for two-player board games like Chess, Go, and Checkers. Offers basic time options for free, with additional features available through in-app purchases.

**Highlights:** Two-player game timer, Supports Chess, Go, Checkers, Simple interface, Basic time options (15, 45, 60 min), In-app purchase for more options

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Time Package (5 minutes and 30 minutes games) | $1.99 | one-time |


### Modern Chess Clock

[App page](https://appshunter.io/ios/app/modern-chess-clock/id1638320662)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RapZap chess clock free?

RapZap chess clock is free to download, with in-app purchases available.

### Is Modern Chess Clock free?

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

### Do RapZap chess clock or Modern Chess Clock have ads?

Neither RapZap chess clock nor Modern Chess Clock shows ads.

### Which is updated more often, RapZap chess clock or Modern Chess Clock?

RapZap chess clock ships an update fortnightly, and Modern Chess Clock every 10 days. Most recently, RapZap chess clock was updated on October 10, 2026 and Modern Chess Clock on October 10, 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.*