# John’s Sudoku vs Diagonal Duel

The clearest difference is ads: John’s Sudoku at none against Diagonal Duel's shown. John’s Sudoku also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 86%). Diagonal Duel's advantage is update cadence (fortnightly vs every 17 months) and ratings volume (20 vs 2). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

John’s Sudoku holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Diagonal Duel has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of John’s Sudoku's written reviews are positive against 86% of Diagonal Duel's.

John’s Sudoku ships an update every 17 months, Diagonal Duel fortnightly. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | John’s Sudoku | Diagonal Duel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/johns-sudoku/id1268251178/reviews)** | [4.8 (20 ratings)](https://appshunter.io/ios/app/diagonal-duel/id1532290974/reviews) |
| Number of ratings | 2 | **20** |
| Positive reviews | **100.0% of reviews** | 85.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 12 MB | 21 MB |
| Requires iOS | **14.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shaojun lin](https://appshunter.io/developer/1263579053) | [Brian Savidge](https://appshunter.io/developer/1532290976) |

## What reviewers say

### John’s Sudoku

[App page](https://appshunter.io/ios/app/johns-sudoku/id1268251178)

This puzzle game offers a comprehensive Sudoku experience with six difficulty levels and the ability to create and share custom puzzles. Enjoy advanced features like error highlighting, auto-pencil, and undo/redo functions for a seamless gameplay experience.

**Highlights:** Six difficulty levels, User-defined puzzles, Error highlighting, Auto-pencil function, Undo/Redo functionality, Import/export puzzles

**Features:** macOS Compatibility

**In-app purchases:** none


### Diagonal Duel

[App page](https://appshunter.io/ios/app/diagonal-duel/id1532290974)

Engage in a strategic board game similar to Connect Four, but with a unique 45-degree rotated board. Challenge a computer opponent, play with a friend on the same device, or compete in online ranked matches.

**Highlights:** 45-degree rotated board gameplay, Play against AI (levels 0-100), Local two-player mode, Online ranked matches, Similar to Connect Four

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

**In-app purchases:** none


## Frequently asked questions

### Is John’s Sudoku free?

John’s Sudoku is free to download, with no in-app purchases.

### Is Diagonal Duel free?

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

### Which has better reviews, John’s Sudoku or Diagonal Duel?

John’s Sudoku is rated higher. John’s Sudoku averages 5.0 out of 5 from 2 ratings, while Diagonal Duel averages 4.8 from 20 ratings.

### Do John’s Sudoku or Diagonal Duel have ads?

Diagonal Duel shows ads; John’s Sudoku does not.

### Which is updated more often, John’s Sudoku or Diagonal Duel?

John’s Sudoku ships an update every 17 months, and Diagonal Duel fortnightly. Most recently, John’s Sudoku was updated on October 23, 2026 and Diagonal Duel on October 25, 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.*