# Sudoku Mastery vs Stack 24

The clearest difference is in-app purchases: Sudoku Mastery at none against Stack 24's 8. Sudoku Mastery also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Stack 24 sells 8 one-off in-app purchases. Sudoku Mastery asks for nothing beyond the download.

## The numbers

| Metric | Sudoku Mastery | Stack 24 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/stack-24/id6736606835/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 32 MB | 131 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ByungJo Ahn](https://appshunter.io/developer/1719364657) | [Funvent Studios Fzco](https://appshunter.io/developer/1748115755) |

## What reviewers say

### Sudoku Mastery

[App page](https://appshunter.io/ios/app/sudoku-mastery/id6711336744)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack 24

[App page](https://appshunter.io/ios/app/stack-24/id6736606835)

A relaxing puzzle game where you merge numbered tiles to create increasingly larger numbers. Strategize your moves to avoid filling the board and aim for the highest possible score. Enjoy a satisfying challenge as numbers grow.

**Highlights:** Merge two tiles of the same number, Merge three or more for bigger numbers, Strategic tile placement, Progressive number stacking, Infinite number climbing challenge, Relaxing gameplay

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gems Sale Pack 1 | $1.99 | one-time |
| Mini Gems Pack | $2.99 | one-time |
| Gems Sale Pack 2 | $3.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Small Gems Pack | $7.99 | one-time |
| Medium Gems Pack | $15.99 | one-time |
| Large Gems Pack | $29.99 | one-time |
| Huge Gems Pack | $49.99 | one-time |


## Frequently asked questions

### Is Sudoku Mastery free?

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

### Is Stack 24 free?

Stack 24 is free to download, with in-app purchases available.

### Do Sudoku Mastery or Stack 24 have ads?

Stack 24 shows ads; Sudoku Mastery does not.

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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.*