# Grandmaster Chess Clock vs Rummi Timer

The clearest difference is in-app purchases: Rummi Timer at none against Grandmaster Chess Clock's 3. Rummi Timer also leads on ads (none vs shown). Grandmaster Chess Clock's advantage is update cadence (every 2 days vs every 10 months) and iOS requirement (15.1 vs 18.4). On price and device support there is nothing between them.

Both are free to download. Grandmaster Chess Clock sells 3 in-app purchases, starting at $4.99 per month. Rummi Timer asks for nothing beyond the download.

Grandmaster Chess Clock ships an update every 2 days, Rummi Timer every 10 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Grandmaster Chess Clock | Rummi Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/grandmaster-chess-clock/id6746950623/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 10 months |
| Monetization | Ad-supported | — |
| Size | 54 MB | 1 MB |
| Requires iOS | **15.1** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aras Atakligan](https://appshunter.io/developer/1819101189) | [HAN SHENG WANG](https://appshunter.io/developer/1833824057) |

## What reviewers say

### Grandmaster Chess Clock

[App page](https://appshunter.io/ios/app/grandmaster-chess-clock/id6746950623)

This app provides precise timing for chess games, supporting various time controls and offering detailed game history tracking. It allows users to record, share, and analyze their games, making it ideal for tournament players and enthusiasts looking to improve their time management.

**Highlights:** Versatile time controls (Rapid, Blitz, Bullet), Customizable time settings with increment/delay, Automatic game recording and detailed statistics, Share and export game records and history, Tournament-ready precision timing, Elegant dark theme and intuitive interface, Multi-language support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clock Pro Monthly | $4.99 | per month |
| Clock Pro Annual | $24.99 | per year |
| Clock Pro Lifetime | $44.99 | one-time |


### Rummi Timer

[App page](https://appshunter.io/ios/app/rummi-timer/id6751647116)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grandmaster Chess Clock free?

Grandmaster Chess Clock is free to download, with in-app purchases available.

### Is Rummi Timer free?

Rummi Timer is free to download, with no in-app purchases.

### Do Grandmaster Chess Clock or Rummi Timer have ads?

Grandmaster Chess Clock shows ads; Rummi Timer does not.

### Which is updated more often, Grandmaster Chess Clock or Rummi Timer?

Grandmaster Chess Clock ships an update every 2 days, and Rummi Timer every 10 months. Most recently, Grandmaster Chess Clock was updated on October 24, 2026 and Rummi Timer on October 28, 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.*