# Happy Stack Equilibrium vs 4Mind Block

The clearest difference is in-app purchases: Happy Stack Equilibrium at none against 4Mind Block's 1. Happy Stack Equilibrium also leads on ads (none vs shown). 4Mind Block's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. 4Mind Block sells 1 one-off in-app purchase. Happy Stack Equilibrium asks for nothing beyond the download.

## The numbers

| Metric | Happy Stack Equilibrium | 4Mind Block |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 76 months | — |
| Size | 75 MB | 42 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Francesc Navarro Machio](https://appshunter.io/developer/488794379) | [Mehmet Usta](https://appshunter.io/developer/1828720493) |

## What reviewers say

### Happy Stack Equilibrium

[App page](https://appshunter.io/ios/app/happy-stack-equilibrium/id1519015365)

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

**In-app purchases:** none


### 4Mind Block

[App page](https://appshunter.io/ios/app/4mind-block/id6786305163)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Happy Stack Equilibrium free?

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

### Is 4Mind Block free?

4Mind Block is free to download, with in-app purchases available.

### Do Happy Stack Equilibrium or 4Mind Block have ads?

4Mind Block shows ads; Happy Stack Equilibrium 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.*