# Chess Clock vs Clear Sudoku

The clearest difference is rating: Clear Sudoku at 5.0 against Chess Clock's 4.3. Clear Sudoku also leads on in-app purchases (none vs 1). Chess Clock's advantage is ratings volume (3 vs 1). On price, update cadence, ads and monetization model there is nothing between them.

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

Clear Sudoku holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Chess Clock ships an update every 4 days, Clear Sudoku every 3 days. The most recent releases landed on September 6, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Chess Clock | Clear Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/chess-clock-chess-timer/id6738325657/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clear-sudoku/id6739845532/reviews)** |
| Number of ratings | **3** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Free | Free |
| Size | 30 MB | 4 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SVEIN ROBIN OPLAND](https://appshunter.io/developer/1742043807) | [正越 陈](https://appshunter.io/developer/1786018519) |

## What reviewers say

### Chess Clock

[App page](https://appshunter.io/ios/app/chess-clock-chess-timer/id6738325657)

This app provides a customizable chess clock with various timing modes, including increment, Fisher, Bronstein, and delay. It features a user-friendly interface and an easy-to-tap timer designed for both casual and competitive players.

**Highlights:** Preset timing options, Customizable timers (increment, Fisher, Bronstein, Delay), Multi-stage timers, Individual player settings, User-friendly interface, Easy-to-tap active player button

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Clear Sudoku

[App page](https://appshunter.io/ios/app/clear-sudoku/id6739845532)

Engage in a classic Sudoku puzzle experience with a modern, minimalist design. Enjoy an ad-free interface with multiple difficulty levels, progress tracking, and helpful solving tools. Perfect for both new and experienced players seeking mental stimulation.

**Highlights:** 100% Ad-free experience, Five difficulty levels, Clean and elegant design, Built-in timer and personal best records, Candidate number support, Undo/Redo functionality, Error detection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chess Clock free?

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

### Is Clear Sudoku free?

Clear Sudoku is free to download, with no in-app purchases.

### Which has better reviews, Chess Clock or Clear Sudoku?

Clear Sudoku is rated higher. Chess Clock averages 4.3 out of 5 from 3 ratings, while Clear Sudoku averages 5.0 from 1 ratings.

### Do Chess Clock or Clear Sudoku have ads?

Neither Chess Clock nor Clear Sudoku shows ads.

### Which is updated more often, Chess Clock or Clear Sudoku?

Chess Clock ships an update every 4 days, and Clear Sudoku every 3 days. Most recently, Chess Clock was updated on September 6, 2026 and Clear Sudoku on June 1, 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.*