# Sudoku vs Stack Em! Cosmic Blocks

The clearest difference is in-app purchases: Stack Em! Cosmic Blocks at none against Sudoku's 3. Stack Em! Cosmic Blocks also leads on ads (none vs shown) and rating (5.0 vs 4.5). Sudoku's advantage is ratings volume (660 vs 2) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Sudoku sells 3 in-app purchases, starting at $0.99 per month. Stack Em! Cosmic Blocks asks for nothing beyond the download.

Stack Em! Cosmic Blocks holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sudoku has 660 ratings behind it against 2, so its average is the more settled of the two.

Sudoku ships an update every 5 weeks, Stack Em! Cosmic Blocks every 3 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sudoku | Stack Em! Cosmic Blocks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (660 ratings)](https://appshunter.io/ios/app/sudoku-aged-studio/id1527531742/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/stack-em-cosmic-blocks/id6774973758/reviews)** |
| Number of ratings | **660** | 2 |
| Positive reviews | 50.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 136 MB | 31 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Aged Studio Limited](https://appshunter.io/developer/1482887934) | [JMM Technologies](https://appshunter.io/developer/6774973760) |

## What reviewers say

### Sudoku

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

Engage your logic and memory with this classic number-placement puzzle game. It offers multiple difficulty levels, helpful tools like hints and undo, and daily challenges to sharpen your skills. Enjoy a relaxing yet mentally stimulating experience on your phone or tablet.

**Highlights:** Daily and My Challenges, 4 difficulty levels, Highlighting of selected numbers and related cells, Hint and Intelligent Hint functions, Error Cap and Automatic Error-Checking, Unlimited Undo/Redo, Autosave incomplete games

**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


### Stack Em! Cosmic Blocks

[App page](https://appshunter.io/ios/app/stack-em-cosmic-blocks/id6774973758)

A relaxing block puzzle game designed for short play sessions. Drag and drop pieces to complete rows and columns, clear space, and aim for high scores. Enjoy satisfying visual and audio feedback with multiple themes.

**Highlights:** Ad-free gameplay, Fast offline play, No account required, Smooth drag-and-drop controls, Satisfying clears and combos, Multiple unlockable themes

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku free?

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

### Is Stack Em! Cosmic Blocks free?

Stack Em! Cosmic Blocks is free to download, with no in-app purchases.

### Which has better reviews, Sudoku or Stack Em! Cosmic Blocks?

Stack Em! Cosmic Blocks is rated higher. Sudoku averages 4.5 out of 5 from 660 ratings, while Stack Em! Cosmic Blocks averages 5.0 from 2 ratings.

### Do Sudoku or Stack Em! Cosmic Blocks have ads?

Sudoku shows ads; Stack Em! Cosmic Blocks does not.

### Which is updated more often, Sudoku or Stack Em! Cosmic Blocks?

Sudoku ships an update every 5 weeks, and Stack Em! Cosmic Blocks every 3 days. Most recently, Sudoku was updated on October 29, 2026 and Stack Em! Cosmic Blocks on October 24, 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.*