# Missing Numbers Minds vs Full Scale HSI

The clearest difference is in-app purchases: Full Scale HSI at none against Missing Numbers Minds's 2. Full Scale HSI also leads on iOS requirement (17.0 vs 26.1). On price, ads and device support there is nothing between them.

Both are free to download. Missing Numbers Minds sells 2 one-off in-app purchases. Full Scale HSI asks for nothing beyond the download.

## The numbers

| Metric | Missing Numbers Minds | Full Scale HSI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 4 MB | 3 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Juan Fullana](https://appshunter.io/developer/692107580) | [Chanon Mallanoo](https://appshunter.io/developer/6795595335) |

## What reviewers say

### Missing Numbers Minds

[App page](https://appshunter.io/ios/app/missing-numbers-minds/id980949764)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation for maintenance. | $0.99 | one-time |
| Extra for develop and maintenance | $0.99 | one-time |


### Full Scale HSI

[App page](https://appshunter.io/ios/app/full-scale-hsi/id6796811859)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Missing Numbers Minds free?

Missing Numbers Minds is free to download, with in-app purchases available.

### Is Full Scale HSI free?

Full Scale HSI is free to download, with no in-app purchases.

### Do Missing Numbers Minds or Full Scale HSI have ads?

Neither Missing Numbers Minds nor Full Scale HSI shows ads.

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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.*