# Brain Room vs Stack 21

The clearest difference is ads: Stack 21 at none against Brain Room's shown. Brain Room's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price 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.

## The numbers

| Metric | Brain Room | Stack 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (58 ratings)](https://appshunter.io/ios/app/brain-room-block-push-puzzle/id1588265988/reviews)** | — |
| Number of ratings | **58** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | Ad-supported | — |
| Size | 81 MB | 3 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Uno](https://appshunter.io/developer/1570016990) | [Doleman Enterprises](https://appshunter.io/developer/1453418600) |

## What reviewers say

### Brain Room

[App page](https://appshunter.io/ios/app/brain-room-block-push-puzzle/id1588265988)

Engage your mind with a classic block-pushing puzzle game. The objective is to strategically move blocks to designated storage locations. Enjoy a simple yet challenging experience designed to test your logic and spatial reasoning skills.

**Highlights:** Block pushing mechanics, Storage location objectives, Logic and spatial reasoning challenges, Classic puzzle gameplay, Simple interface

**In-app purchases:** none


### Stack 21

[App page](https://appshunter.io/ios/app/stack-21/id6819406129)

**In-app purchases:** none


## Frequently asked questions

### Is Brain Room free?

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

### Is Stack 21 free?

Stack 21 is free to download, with no in-app purchases.

### Do Brain Room or Stack 21 have ads?

Brain Room shows ads; Stack 21 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.*