# e vs Cortex

The clearest difference is iOS requirement: Cortex at 13.0 against e's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e ships an update every 2 weeks, Cortex monthly. The most recent releases landed on September 7, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | e | Cortex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 33 MB | 40 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PRIMER SOFTWARE P.C.](https://appshunter.io/developer/1604333837) | [KIOUR PC](https://appshunter.io/developer/1657350555) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e/id1604333835)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cortex

[App page](https://appshunter.io/ios/app/cortex/id6444849957)

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is Cortex free?

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

### Do e or Cortex have ads?

Neither e nor Cortex shows ads.

### Which is updated more often, e or Cortex?

e ships an update every 2 weeks, and Cortex monthly. Most recently, e was updated on September 7, 2026 and Cortex on September 19, 2026.

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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.*