# SodokuMaster vs IMPOSSIBLE RIDDLES CHALLENGE

The clearest difference is in-app purchases: IMPOSSIBLE RIDDLES CHALLENGE at none against SodokuMaster's 1. SodokuMaster's advantage is iOS requirement (9.0 vs 13.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SodokuMaster sells 1 one-off in-app purchase. IMPOSSIBLE RIDDLES CHALLENGE asks for nothing beyond the download.

SodokuMaster ships an update every 3 weeks, IMPOSSIBLE RIDDLES CHALLENGE monthly. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SodokuMaster | IMPOSSIBLE RIDDLES CHALLENGE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (26 ratings)](https://appshunter.io/ios/app/sodokumaster/id1447735633/reviews)** | — |
| Number of ratings | **26** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 88 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hoa Nguyen Quang](https://appshunter.io/developer/1434185665) | [NGUYEN DUC HIEU](https://appshunter.io/developer/762617890) |

## What reviewers say

### SodokuMaster

[App page](https://appshunter.io/ios/app/sodokumaster/id1447735633)

This game offers a variety of Sudoku puzzles for all skill levels, from beginner to expert. It provides features like different playing modes, difficulty levels, and helpful tools to enhance the gameplay experience and keep your mind active.

**Highlights:** Two playing modes: Normal and Challenge, Five levels of difficulty, Over 5,000 puzzles, Auto-Check and Pencil mode, Highlight duplicates, Undo/Redo functions, Hints and auto-save

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### IMPOSSIBLE RIDDLES CHALLENGE

[App page](https://appshunter.io/ios/app/impossible-riddles-challenge/id6478904975)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SodokuMaster free?

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

### Is IMPOSSIBLE RIDDLES CHALLENGE free?

IMPOSSIBLE RIDDLES CHALLENGE is free to download, with no in-app purchases.

### Do SodokuMaster or IMPOSSIBLE RIDDLES CHALLENGE have ads?

Neither SodokuMaster nor IMPOSSIBLE RIDDLES CHALLENGE shows ads.

### Which is updated more often, SodokuMaster or IMPOSSIBLE RIDDLES CHALLENGE?

SodokuMaster ships an update every 3 weeks, and IMPOSSIBLE RIDDLES CHALLENGE monthly. Most recently, SodokuMaster was updated on October 7, 2026 and IMPOSSIBLE RIDDLES CHALLENGE on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*