# GST[AR] vs Irschen

GST[AR] and Irschen are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

GST[AR] ships an update every 4 months, Irschen every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | GST[AR] | Irschen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gstar/id1519232314/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 2 MB | 9 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GiGa infosystems GmbH](https://appshunter.io/developer/1519232496) | [Mobile3D](https://appshunter.io/developer/351890208) |

## What reviewers say

### GST[AR]

[App page](https://appshunter.io/ios/app/gstar/id1519232314)

Explore and visualize geological models in augmented reality. Browse a selection of models, place them on any surface, and interact with them by rotating, scaling, and highlighting features. Share your AR sessions with others for collaborative exploration.

**Highlights:** Browse geological models, View models in AR, Rotate and scale models, Highlight model features, Share AR sessions, Customize AR settings, Add custom model sources

**In-app purchases:** none


### Irschen

[App page](https://appshunter.io/ios/app/irschen/id1618450392)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GST[AR] free?

GST[AR] is free to download, with no in-app purchases.

### Is Irschen free?

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

### Do GST[AR] or Irschen have ads?

Neither GST[AR] nor Irschen shows ads.

### Which is updated more often, GST[AR] or Irschen?

GST[AR] ships an update every 4 months, and Irschen every 3 months. Most recently, GST[AR] was updated on November 3, 2026 and Irschen on November 3, 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.*