# Leonardo 4.0 vs STS Leonardo

The clearest difference is update cadence: STS Leonardo at every 3 weeks against Leonardo 4.0's every 3 months. Leonardo 4.0's advantage is iOS requirement (13.0 vs 15.6). On price, ads, 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.

Leonardo 4.0 ships an update every 3 months, STS Leonardo every 3 weeks. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Leonardo 4.0 | STS Leonardo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 60 MB | 58 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMG Sicurezza Italia S.R.L.S.](https://appshunter.io/developer/1495771178) | [STS Elettronica Srl](https://appshunter.io/developer/1189869276) |

## What reviewers say

### Leonardo 4.0

[App page](https://appshunter.io/ios/app/leonardo-40/id1474784900)

**Features:** macOS Compatibility

**In-app purchases:** none


### STS Leonardo

[App page](https://appshunter.io/ios/app/sts-leonardo/id6608973345)

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

**In-app purchases:** none


## Frequently asked questions

### Is Leonardo 4.0 free?

Leonardo 4.0 is free to download, with no in-app purchases.

### Is STS Leonardo free?

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

### Do Leonardo 4.0 or STS Leonardo have ads?

Neither Leonardo 4.0 nor STS Leonardo shows ads.

### Which is updated more often, Leonardo 4.0 or STS Leonardo?

Leonardo 4.0 ships an update every 3 months, and STS Leonardo every 3 weeks. Most recently, Leonardo 4.0 was updated on September 8, 2026 and STS Leonardo on September 9, 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.*