# Stack Number vs Sudoku Dojo

The clearest difference is in-app purchases: Stack Number at none against Sudoku Dojo's 1. Sudoku Dojo's advantage is ads (none vs shown) and update cadence (every 2 days vs every 24 months). On price and device support there is nothing between them.

Both are free to download. Sudoku Dojo sells 1 one-off in-app purchase. Stack Number asks for nothing beyond the download.

Stack Number ships an update every 24 months, Sudoku Dojo every 2 days. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Stack Number | Sudoku Dojo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/stack-number/id1048071754/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 24 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 17 MB | 32 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亚州 王](https://appshunter.io/developer/991530214) | [静 陈](https://appshunter.io/developer/6802329527) |

## What reviewers say

### Stack Number

[App page](https://appshunter.io/ios/app/stack-number/id1048071754)

Tap to drop blocks and merge adjacent ones with the same value to create higher numbers. Aim for the highest score possible in this engaging puzzle game.

**Highlights:** Block dropping mechanic, Adjacent block merging, Number value progression, High score pursuit, Simple tap controls

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

**In-app purchases:** none


### Sudoku Dojo

[App page](https://appshunter.io/ios/app/sudoku-dojo/id6802350460)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version Unlock | $2.99 | one-time |


## Frequently asked questions

### Is Stack Number free?

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

### Is Sudoku Dojo free?

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

### Do Stack Number or Sudoku Dojo have ads?

Stack Number shows ads; Sudoku Dojo does not.

### Which is updated more often, Stack Number or Sudoku Dojo?

Stack Number ships an update every 24 months, and Sudoku Dojo every 2 days. Most recently, Stack Number was updated on October 3, 2026 and Sudoku Dojo 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.*