# GAMMA AR vs StackFM Portal

The clearest difference is update cadence: GAMMA AR at every 2 weeks against StackFM Portal's every 3 months. GAMMA AR also leads on ratings volume (8 vs 1). StackFM Portal's advantage is rating (5.0 vs 4.6). 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.

StackFM Portal 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.

GAMMA AR ships an update every 2 weeks, StackFM Portal every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | GAMMA AR | StackFM Portal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (8 ratings)](https://appshunter.io/ios/app/gamma-ar/id1298017298/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stackfm-portal/id1472967342/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 384 MB | 6 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GAMMA Technologies](https://appshunter.io/developer/1495307075) | [StackFM](https://appshunter.io/developer/909035419) |

## 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


### StackFM Portal

[App page](https://appshunter.io/ios/app/stackfm-portal/id1472967342)

This mobile application serves as a gateway to the CIMS platform, StackFM. It allows users with an active subscription to effectively manage their employee portal.

**Highlights:** Employee portal management, Access to CIMS platform, Subscription-based access, Mobile accessibility

**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 StackFM Portal free?

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

### Which has better reviews, GAMMA AR or StackFM Portal?

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

### Do GAMMA AR or StackFM Portal have ads?

Neither GAMMA AR nor StackFM Portal shows ads.

### Which is updated more often, GAMMA AR or StackFM Portal?

GAMMA AR ships an update every 2 weeks, and StackFM Portal every 3 months. Most recently, GAMMA AR was updated on November 3, 2026 and StackFM Portal 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.*