# LeatherLog vs 3 Weeks AI Challenge

The clearest difference is ads: 3 Weeks AI Challenge at none against LeatherLog's shown. 3 Weeks AI Challenge also leads on iOS requirement (15.6 vs 18.0). On price, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | LeatherLog | 3 Weeks AI Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Daily | — |
| Size | 8 MB | 9 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yoshitaka Tanaka](https://appshunter.io/developer/1510093015) | [Amine Aziz](https://appshunter.io/developer/1832331697) |

## What reviewers say

### LeatherLog

[App page](https://appshunter.io/ios/app/leatherlog/id6541765824)

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

**In-app purchases:** none


### 3 Weeks AI Challenge

[App page](https://appshunter.io/ios/app/3-weeks-ai-challenge/id6754894198)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LeatherLog free?

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

### Is 3 Weeks AI Challenge free?

3 Weeks AI Challenge is free to download, with no in-app purchases.

### Do LeatherLog or 3 Weeks AI Challenge have ads?

LeatherLog shows ads; 3 Weeks AI Challenge does not.

---

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