# Structural Navigator vs GAMMA AR

The clearest difference is review sentiment: GAMMA AR at 86% against Structural Navigator's 50%. GAMMA AR also leads on update cadence (every 2 weeks vs every 5 months) and ratings volume (8 vs 1). Structural Navigator's advantage is rating (5.0 vs 4.6) and iOS requirement (9.1 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Structural Navigator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: GAMMA AR has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Structural Navigator's written reviews are positive against 86% of GAMMA AR's, so the app with the better star average is not the one people write more warmly about.

Structural Navigator ships an update every 5 months, GAMMA AR every 2 weeks. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Structural Navigator | GAMMA AR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-navigator/id479978190/reviews)** | [4.6 (8 ratings)](https://appshunter.io/ios/app/gamma-ar/id1298017298/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | 50.0% of reviews | **85.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 90 MB | 378 MB |
| Requires iOS | **9.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bentley Systems, Inc.](https://appshunter.io/developer/457925574) | [GAMMA Technologies](https://appshunter.io/developer/1495307075) |

## What reviewers say

### Structural Navigator

[App page](https://appshunter.io/ios/app/structural-navigator/id479978190)

View, query, and annotate 3D structural models on your mobile device. Navigate complex designs with intuitive controls, filter elements by properties, and check for clashes. Ideal for on-site reviews and collaboration.

**Highlights:** 3D model navigation (zoom, rotate, pan), Color-coding by element properties, Filtering models by member attributes, Clash detection between objects, Adding markups with status and due dates, Interactive querying of member properties

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Structural Navigator free?

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

### Is GAMMA AR free?

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

### Which has better reviews, Structural Navigator or GAMMA AR?

Structural Navigator is rated higher. Structural Navigator averages 5.0 out of 5 from 1 ratings, while GAMMA AR averages 4.6 from 8 ratings.

### Do Structural Navigator or GAMMA AR have ads?

Neither Structural Navigator nor GAMMA AR shows ads.

### Which is updated more often, Structural Navigator or GAMMA AR?

Structural Navigator ships an update every 5 months, and GAMMA AR every 2 weeks. Most recently, Structural Navigator was updated on October 5, 2026 and GAMMA AR on October 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.*