# Cortex vs Opterra Cortex

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

Both are free to download. Cortex sells 3 in-app purchases, starting at $6.99 per month. 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 5 days | — |
| Size | 78 MB | 35 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Dmitry Afanasyev](https://appshunter.io/developer/1788884993) | [Evan Graven](https://appshunter.io/developer/1587270899) |

## What reviewers say

### Cortex

[App page](https://appshunter.io/ios/app/cortex-ai-focus-timer/id6759869031)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Focus Timer Premium | $6.99 | per month |
| AI Focus Timer Premium | $49.99 | per year |
| AI Focus Timer Lifetime | $99.99 | 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*