# Leaf vs CORTEX_

The clearest difference is in-app purchases: Leaf at none against CORTEX_'s 4. CORTEX_'s advantage is update cadence (every 6 weeks vs every 3 months) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. CORTEX_ sells 4 in-app purchases, starting at $19.99 per month. Leaf asks for nothing beyond the download.

Leaf ships an update every 3 months, CORTEX_ every 6 weeks. Both last shipped on October 28, 2026.

## The numbers

| Metric | Leaf | CORTEX_ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Size | 7 MB | 337 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Big Numbers, Inc.](https://appshunter.io/developer/1806217941) | [George Bayze](https://appshunter.io/developer/1884716979) |

## What reviewers say

### Leaf

[App page](https://appshunter.io/ios/app/leaf-eco-ai-chat/id6757168284)

**In-app purchases:** none


### CORTEX_

[App page](https://appshunter.io/ios/app/cortex/id6788205210)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CORTEX Pro | $19.99 | per month |
| CORTEX Operator | $59.00 | per month |
| CORTEX Pro (Yearly) | $199.99 | per year |
| CORTEX Operator (Yearly) | $499.99 | per year |


## Frequently asked questions

### Is Leaf free?

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

### Is CORTEX_ free?

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

### Do Leaf or CORTEX_ have ads?

Neither Leaf nor CORTEX_ shows ads.

### Which is updated more often, Leaf or CORTEX_?

Leaf ships an update every 3 months, and CORTEX_ every 6 weeks. Most recently, Leaf was updated on October 28, 2026 and CORTEX_ on October 28, 2026.

---

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