# Sudoku vs Silent Library

The clearest difference is in-app purchases: Silent Library at none against Sudoku's 3. Silent Library also leads on ads (none vs shown). Sudoku's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Sudoku sells 3 in-app purchases, starting at $0.99 per month. Silent Library asks for nothing beyond the download.

Sudoku ships an update every 5 weeks, Silent Library every 6 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sudoku | Silent Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (660 ratings)](https://appshunter.io/ios/app/sudoku-aged-studio/id1527531742/reviews)** | — |
| Number of ratings | **660** | — |
| Positive reviews | 50.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 136 MB | 43 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Aged Studio Limited](https://appshunter.io/developer/1482887934) | [Country Hills Animal Clinic Inc](https://appshunter.io/developer/6796360527) |

## What reviewers say

### Sudoku

[App page](https://appshunter.io/ios/app/sudoku-aged-studio/id1527531742)

This logic puzzle game challenges you to fill a 9x9 grid with numbers 1-9, ensuring no repeats in rows, columns, or sub-grids. It offers multiple difficulty levels, helpful tools like hints and undo, and daily challenges to sharpen your brain and memory.

**Highlights:** 4 difficulty levels, Daily and My Challenges, Hint and Undo/Redo functions, Highlighting for selected numbers, Automatic error-checking, Multiple background styles

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads - 1 Month | $0.99 | per month |
| Remove Ads - 3 Months | $2.49 | per 3 months |
| Remove All Ads - 1 Year | $8.49 | per year |

**What reviewers like**

- 🚀 Fast and smooth gameplay
- 👍 Relaxing and challenging
- 💡 Flexible options and settings
- 🧠 Excellent mental exercise

**What reviewers complain about**

- 🔍 Excessive advertisements
- 🙄 Ads interrupt gameplay
- 🤔 Inconsistent scoring system
- 🤯 Too many ads after updates

**Reported bugs**

- Ads cause app to freeze or crash
- Subscription issues with ad removal
- Incorrect difficulty level labeling

**Requested features**

- Landscape mode support
- Auto-fill candidate numbers
- More advanced difficulty levels
- Customizable UI and themes


### Silent Library

[App page](https://appshunter.io/ios/app/silent-library/id6796360525)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku free?

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

### Is Silent Library free?

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

### Do Sudoku or Silent Library have ads?

Sudoku shows ads; Silent Library does not.

### Which is updated more often, Sudoku or Silent Library?

Sudoku ships an update every 5 weeks, and Silent Library every 6 weeks. Most recently, Sudoku was updated on November 7, 2026 and Silent Library on October 31, 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.*