# IUGA vs S.Tool

The clearest difference is update cadence: S.Tool at every 2 months against IUGA's every 6 months. 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.

IUGA ships an update every 6 months, S.Tool every 2 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | IUGA | S.Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 115 MB | 66 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [IUGA](https://appshunter.io/developer/1192146009) | [Katholieke Universiteit te Leuven](https://appshunter.io/developer/925286039) |

## What reviewers say

### IUGA

[App page](https://appshunter.io/ios/app/iuga/id1546091390)

**Features:** Vision Pro support

**In-app purchases:** none


### S.Tool

[App page](https://appshunter.io/ios/app/stool/id6739492755)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IUGA free?

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

### Is S.Tool free?

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

### Do IUGA or S.Tool have ads?

Neither IUGA nor S.Tool shows ads.

### Which is updated more often, IUGA or S.Tool?

IUGA ships an update every 6 months, and S.Tool every 2 months. Most recently, IUGA was updated on November 3, 2026 and S.Tool on November 8, 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.*