# Chess Puzzles vs SudokuOS

The clearest difference is in-app purchases: SudokuOS at none against Chess Puzzles's 1. SudokuOS also leads on update cadence (every 4 days vs weekly). Chess Puzzles's advantage is review sentiment (91% vs 71%). On price, ads, device support and iOS requirement there is nothing between them.

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

Chess Puzzles ships an update weekly, SudokuOS every 4 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Chess Puzzles | SudokuOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (39 ratings)](https://appshunter.io/ios/app/chess-puzzles-offchess/id6744736661/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | **91.3% of reviews** | 71.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 52 MB | 10 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Avadhesh Bhunwaliya](https://appshunter.io/developer/1723608557) | [Seidelapps](https://appshunter.io/developer/6819037694) |

## What reviewers say

### Chess Puzzles

[App page](https://appshunter.io/ios/app/chess-puzzles-offchess/id6744736661)

Enhance your chess tactics with over 100,000 offline puzzles. Train anytime, anywhere, regardless of internet access. Features adaptive difficulty, detailed stats, and various puzzle themes for all skill levels.

**Highlights:** 100K+ chess tactics and puzzles, Fully offline functionality, Adaptive difficulty adjustment, Detailed progress tracking, Multiple puzzle themes, Smart hint system, Customizable board themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OffChess Unlimited | $3.99 | one-time |


### SudokuOS

[App page](https://appshunter.io/ios/app/sudokuos/id6819037692)

Solve Sudoku puzzles with five difficulty levels on your iPhone or iPad. Utilize notes, candidates, hints, and an erase function. Track your progress with ratings and charts, and enjoy automatic saving for uninterrupted gameplay.

**Highlights:** Five difficulty levels, Notes and candidate filling, Hint and erase functions, Progress tracking and rating, Automatic game saving, Customizable accent colors and haptics

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

**In-app purchases:** none


## Frequently asked questions

### Is Chess Puzzles free?

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

### Is SudokuOS free?

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

### Do Chess Puzzles or SudokuOS have ads?

Neither Chess Puzzles nor SudokuOS shows ads.

### Which is updated more often, Chess Puzzles or SudokuOS?

Chess Puzzles ships an update weekly, and SudokuOS every 4 days. Most recently, Chess Puzzles was updated on November 8, 2026 and SudokuOS on November 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.*