# Shift & Stack vs Sudoku Mentor

The clearest difference is in-app purchases: Shift & Stack at none against Sudoku Mentor's 1. Shift & Stack also leads on device support. On price and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Shift & Stack | Sudoku Mentor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Size | 54 MB | 17 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [eitezaz ahmad](https://appshunter.io/developer/1027303006) | [杭州一点不同科技有限公司](https://appshunter.io/developer/1719597086) |

## What reviewers say

### Shift & Stack

[App page](https://appshunter.io/ios/app/shift-and-stack/id6757802613)

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

**In-app purchases:** none


### Sudoku Mentor

[App page](https://appshunter.io/ios/app/sudoku-mentor/id6759636236)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sudoku Mentor Pro | $0.99 | one-time |


## Frequently asked questions

### Is Shift & Stack free?

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

### Is Sudoku Mentor free?

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

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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.*