# OkuDoku Number Brain Challenge vs PathMemory

The clearest difference is iOS requirement: OkuDoku Number Brain Challenge at 13.0 against PathMemory's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OkuDoku Number Brain Challenge ships an update every 3 weeks, PathMemory every 2 weeks. Both last shipped on September 9, 2026.

## The numbers

| Metric | OkuDoku Number Brain Challenge | PathMemory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (81 ratings)](https://appshunter.io/ios/app/okudoku-number-brain-challenge/id1514940326/reviews)** | — |
| Number of ratings | **81** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 10 MB | 40 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pawel Kieczko](https://appshunter.io/developer/1498102835) | [Lukas Ulbrich](https://appshunter.io/developer/1809532893) |

## What reviewers say

### OkuDoku Number Brain Challenge

[App page](https://appshunter.io/ios/app/okudoku-number-brain-challenge/id1514940326)

This game blends Sudoku and Tetris mechanics, challenging players to strategically place numbered blocks to form lines and squares. Compete against your own high scores or tackle daily challenges with predefined board setups.

**Highlights:** Combine Sudoku and Tetris gameplay, Drag and drop numbered blocks, Score by completing lines and squares, Plan moves for high scores, Daily challenges with predefined boards, Compete against personal bests

**Features:** Vision Pro support

**In-app purchases:** none


### PathMemory

[App page](https://appshunter.io/ios/app/pathmemory/id6774155609)

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

**In-app purchases:** none


## Frequently asked questions

### Is OkuDoku Number Brain Challenge free?

OkuDoku Number Brain Challenge is free to download, with no in-app purchases.

### Is PathMemory free?

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

### Do OkuDoku Number Brain Challenge or PathMemory have ads?

Both OkuDoku Number Brain Challenge and PathMemory show ads.

### Which is updated more often, OkuDoku Number Brain Challenge or PathMemory?

OkuDoku Number Brain Challenge ships an update every 3 weeks, and PathMemory every 2 weeks. Most recently, OkuDoku Number Brain Challenge was updated on September 9, 2026 and PathMemory on September 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.*