# Kassi vs Cortex

The clearest difference is in-app purchases: Kassi at none against Cortex's 2. Kassi also leads on iOS requirement (15.0 vs 17.0). Cortex's advantage is device support. On price there is nothing between them.

Both are free to download. Cortex sells 2 in-app purchases, starting at $11.99 per month. Kassi asks for nothing beyond the download.

## The numbers

| Metric | Kassi | Cortex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Weekly |
| Size | 41 MB | 87 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Ilya Ostrerov](https://appshunter.io/developer/419103501) | [Rudrakshi Patel](https://appshunter.io/developer/6775265360) |

## What reviewers say

### Kassi

[App page](https://appshunter.io/ios/app/kassi-kids-store-game/id6759345194)

**In-app purchases:** none


### Cortex

[App page](https://appshunter.io/ios/app/cortex-solve-clinical-cases/id6784620799)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cortex Monthly Subscription | $11.99 | per month |
| Cortex Yearly Subscription | $79.99 | per year |


## Frequently asked questions

### Is Kassi free?

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

### Is Cortex free?

Cortex 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.*