# Shelf vs Sudogu

The clearest difference is rating: Sudogu at 5.0 against Shelf's 1.0. Sudogu also leads on ads (none vs shown). Shelf's advantage is iOS requirement (12.0 vs 16.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

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

Sudogu holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Shelf ships an update monthly, Sudogu fortnightly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Shelf | Sudogu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/shelf-master/id6737683880/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sudogu/id6739965254/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Free |
| Size | 64 MB | 18 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [瑞 黄](https://appshunter.io/developer/1777253829) | [Neil Rohan](https://appshunter.io/developer/1522614743) |

## What reviewers say

### Shelf

[App page](https://appshunter.io/ios/app/shelf-master/id6737683880)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sudogu

[App page](https://appshunter.io/ios/app/sudogu/id6739965254)

This app offers a unique take on Sudoku with user-loaded solution algorithms and instant feedback on incorrect guesses. Enjoy multiple difficulty levels, no time limits, and save your progress anytime. It provides a relaxed, ad-free gaming experience for all ages.

**Highlights:** User loaded solution algorithms, Immediate feedback on wrong guesses, Four difficulty levels, No time limits, Save progress anytime, Detailed game records, Ad-free experience

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

**In-app purchases:** none


## Frequently asked questions

### Is Shelf free?

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

### Is Sudogu free?

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

### Which has better reviews, Shelf or Sudogu?

Sudogu is rated higher. Shelf averages 1.0 out of 5 from 1 ratings, while Sudogu averages 5.0 from 2 ratings.

### Do Shelf or Sudogu have ads?

Shelf shows ads; Sudogu does not.

### Which is updated more often, Shelf or Sudogu?

Shelf ships an update monthly, and Sudogu fortnightly. Most recently, Shelf was updated on October 24, 2026 and Sudogu on October 9, 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.*