# Sudoku vs Stacks.

The clearest difference is review sentiment: Stacks. at 100% against Sudoku's 50%. Stacks. also leads on rating (5.0 vs 4.5) and update cadence (every 2 days vs every 5 weeks). Sudoku's advantage is ratings volume (660 vs 12) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Sudoku sells 3 in-app purchases, starting at $0.99 per month and Stacks. sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Stacks. 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 12, so its average is the more settled of the two. Written reviews point the same way: 50% of Sudoku's written reviews are positive against 100% of Stacks.'s.

Sudoku ships an update every 5 weeks, Stacks. every 2 days. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Sudoku | Stacks. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (660 ratings)](https://appshunter.io/ios/app/sudoku-aged-studio/id1527531742/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/stacks/id6791988835/reviews)** |
| Number of ratings | **660** | 12 |
| Positive reviews | 50.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 136 MB | 13 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Aged Studio Limited](https://appshunter.io/developer/1482887934) | [KHIZER MAHMUD](https://appshunter.io/developer/6791988837) |

## 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


### Stacks.

[App page](https://appshunter.io/ios/app/stacks/id6791988835)

A fast-paced arcade game where players drop blocks with precise timing to build high stacks and achieve new personal bests. Unlock cosmetic items and enjoy daily rewards in this engaging, score-chasing experience.

**Highlights:** One-tap gameplay, Combo system, Unlockable themes and cosmetics, Daily free gift, Local high scores, No account required

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Gems | $0.99 | one-time |
| 500 Coins | $0.99 | one-time |
| Starter Pack | $1.99 | one-time |
| 1,500 Coins | $1.99 | one-time |
| 550 Gems | $4.99 | one-time |
| 5,000 Coins | $4.99 | one-time |
| 1,200 Gems | $9.99 | one-time |


## Frequently asked questions

### Is Sudoku free?

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

### Is Stacks. free?

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

### Which has better reviews, Sudoku or Stacks.?

Stacks. is rated higher. Sudoku averages 4.5 out of 5 from 660 ratings, while Stacks. averages 5.0 from 12 ratings.

### Do Sudoku or Stacks. have ads?

Both Sudoku and Stacks. show ads.

### Which is updated more often, Sudoku or Stacks.?

Sudoku ships an update every 5 weeks, and Stacks. every 2 days. Most recently, Sudoku was updated on October 29, 2026 and Stacks. on October 17, 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.*