# WONDER onSITE vs STL model scanner

The clearest difference is in-app purchases: WONDER onSITE at none against STL model scanner's 1. WONDER onSITE also leads on update cadence (fortnightly vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. STL model scanner sells 1 one-off in-app purchase. WONDER onSITE asks for nothing beyond the download.

WONDER onSITE ships an update fortnightly, STL model scanner every 3 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | WONDER onSITE | STL model scanner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 27 MB | 15 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Deutsche WindGuard Systems GmbH](https://appshunter.io/developer/1542965155) | [婷 刘](https://appshunter.io/developer/1785442312) |

## What reviewers say

### WONDER onSITE

[App page](https://appshunter.io/ios/app/wonder-onsite/id1542965153)

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

**In-app purchases:** none


### STL model scanner

[App page](https://appshunter.io/ios/app/stl-model-scanner/id6742713519)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Available After Purchase | $1.99 | one-time |


## Frequently asked questions

### Is WONDER onSITE free?

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

### Is STL model scanner free?

STL model scanner is free to download, with in-app purchases available.

### Do WONDER onSITE or STL model scanner have ads?

Neither WONDER onSITE nor STL model scanner shows ads.

### Which is updated more often, WONDER onSITE or STL model scanner?

WONDER onSITE ships an update fortnightly, and STL model scanner every 3 months. Most recently, WONDER onSITE was updated on November 3, 2026 and STL model scanner on October 30, 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.*