# Cortex vs Opterra Cortex

The clearest difference is in-app purchases: Opterra Cortex at none against Cortex's 1. Cortex's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Cortex sells 1 one-off in-app purchase. Opterra Cortex asks for nothing beyond the download.

## The numbers

| Metric | Cortex | Opterra Cortex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Size | 84 MB | 35 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ippocode Technologies LLP](https://appshunter.io/developer/1852421273) | [Evan Graven](https://appshunter.io/developer/1587270899) |

## What reviewers say

### Cortex

[App page](https://appshunter.io/ios/app/cortex-local-ai/id6757537386)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cortex Pro | $19.99 | one-time |


### Opterra Cortex

[App page](https://appshunter.io/ios/app/opterra-cortex/id6760212456)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cortex free?

Cortex is free to download, with in-app purchases available.

### Is Opterra Cortex free?

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

### Do Cortex or Opterra Cortex have ads?

Neither Cortex nor Opterra Cortex 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.*