# GAMMA AR vs CatastrApp

The clearest difference is iOS requirement: CatastrApp at 14.0 against GAMMA AR's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 19, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GAMMA AR | CatastrApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (8 ratings)](https://appshunter.io/ios/app/gamma-ar/id1298017298/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 384 MB | 26 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [GAMMA Technologies](https://appshunter.io/developer/1495307075) | [ADA S.A.S](https://appshunter.io/developer/1823966672) |

## What reviewers say

### GAMMA AR

[App page](https://appshunter.io/ios/app/gamma-ar/id1298017298)

Visualize 3D BIM models on construction sites using augmented reality. Compare real-world conditions with plans, detect errors early, and improve communication between site and office. Streamline workflows and reduce costs.

**Highlights:** Augmented reality BIM overlay, On-site construction monitoring, Error detection and prevention, Digital communication channels, Integration with Autodesk, Procore, BIMCollab, BIM model synchronization

**Features:** Vision Pro support

**In-app purchases:** none


### CatastrApp

[App page](https://appshunter.io/ios/app/catastrapp/id6748960809)

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

**In-app purchases:** none


## Frequently asked questions

### Is GAMMA AR free?

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

### Is CatastrApp free?

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

### Do GAMMA AR or CatastrApp have ads?

Neither GAMMA AR nor CatastrApp shows ads.

### Which is updated more often, GAMMA AR or CatastrApp?

GAMMA AR ships an update every 2 weeks, and CatastrApp every 2 weeks. Most recently, GAMMA AR was updated on October 19, 2026 and CatastrApp on October 1, 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.*