Comparison

Structural Navigator vs GAMMA AR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Structural Navigator

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
Read full description

Structural Navigator is the ideal app for the mobile review of 3D structural models. Structural Navigator allows designers to view, query, and red line structural models in 3D from anywhere using a mobile device. With Structural Navigator users can: * Navigate through 3D models using zoom, rotate, pan, walkthrough, and flyover commands * Color code elements within the model according to specific properties (for example, slab thickness, pipe diameter, etc.) * Filter models based on members with common member attributes * Check for clashes between different types of objects * Add markups with status, due date, responsible party, and additional information * Interactively query members for all property values Structural Navigator reads Bentley's i-model format, to which any ISM repository can be easily converted with a single operation. The process is simple. Build a data-rich ISM repository using any Bentley ISM-compliant applications desired, convert the ISM repository to i-model, and then review in Structural Navigator. Structural Navigator can read models from any of the following sources once published to i-model: - STAAD - RAM - SACS - AECOsim - Revit - Tekla - ProStructures - Dlubal RFEM

About

GAMMA AR

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
Read full description

GAMMA AR: Augmented Reality for Construction Site Management GAMMA AR is an application designed for monitoring construction sites. It utilizes augmented reality technology to overlay 3D Building Information Models (BIM) on construction sites using smartphones or tablets. With GAMMA AR, site managers, facility managers, craftsmen, and other stakeholders involved in the construction process can walk through the site and compare real-world conditions with the planning information contained in 3D BIM models. GAMMA AR enables the visualization of 3D BIM models before and during the construction process, thereby fostering a better understanding of the planning, preventing errors, and reducing construction costs. This enables site managers and planners from various disciplines (HLS, architecture, etc.) to collaborate on the construction site using the BIM model, preventing collisions and resolving ambiguities before they lead to errors. Additionally, GAMMA AR allows for the direct detection of errors within the BIM model, enabling adjustments to be made during the planning phase, preventing errors, and ensuring comprehensive monitoring of construction progress. Is GAMMA AR for you? GAMMA AR allows you to connect various software systems such as Autodesk, Procore, and BIMCollab. Construction site managers benefit from GAMMA AR by avoiding errors and eliminating the need to interpret 2D plans. Facility managers can report errors or make adjustments directly in the BIM model via GAMMA AR and transmit this information to other stakeholders involved in the construction process. GAMMA AR is an easy-to-use, intuitive tool that can be applied directly without requiring any training that could increase the cost of implementation. For construction companies, GAMMA AR offers significant benefits: entire departments can be relieved of the burden of communicating via 2D plans, which is no longer necessary. GAMMA AR establishes digital communication channels between the construction site and the office. Using BIM360 or Autodesk Construction Cloud (ACC)? Simply sign in with your Autodesk account, import your IFC, REVIT, and NAVISWORKS models into GAMMA AR, and synchronize your issues with BIM360, ACC, Procore, or BIMCollab. Summary Avoid Errors: Plans on-site are cumbersome and prone to errors! For many tasks, it is faster and safer to review the plans directly on a tablet and compare them with real-world conditions. By working digitally on tablets and smartphones, the reliance on paper plans is significantly reduced, thereby lowering the risk of obsolete information and redundancies. Sync Models and Notes with Your Office: With GAMMA AR, you can send issues directly from the construction site to the office. Each comment is directly linked to a building element or room during site inspections. With this location reference, new information is immediately integrated into the building model. This simplifies documentation and improves communication, as comments are clearly and unambiguously conveyed.

Screenshots

Structural Navigator4 screens
GAMMA AR4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Structural Navigator versus GAMMA AR: the parameters behind the verdict, then further details
ParameterStructural NavigatorGAMMA AR
PriceFreeFree
Rating5.0 (1 ratings) — better4.6 (8 ratings)
Positive reviews50.0% of reviews85.7% of reviews — better
Number of ratings18 — better
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.1 — better16.0
Further details — not scored
Size90 MB378 MB
Age rating4+4+
DeveloperBentley Systems, Inc.GAMMA Technologies

Customer experience

Structural Navigator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

GAMMA AR

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

None

Structural Navigator

No in-app purchases

None

GAMMA AR

No in-app purchases

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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