# iTruss vs OBJ Viewer

The clearest difference is update cadence: OBJ Viewer at every 6 days against iTruss's every 23 months. iTruss's advantage is iOS requirement (11.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

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

iTruss ships an update every 23 months, OBJ Viewer every 6 days. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | iTruss | OBJ Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (15 ratings)](https://appshunter.io/ios/app/itruss/id363376468/reviews)** | — |
| Number of ratings | **15** | — |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 23 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 70 MB | 1 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Xtreme Structures & Fabrication LLC](https://appshunter.io/developer/363376471) | [Shota Sukhiashvili](https://appshunter.io/developer/1843072730) |

## What reviewers say

### iTruss

[App page](https://appshunter.io/ios/app/itruss/id363376468)

Calculate structural loads, spans, and truss requirements for construction projects directly from your iPhone. This tool simplifies complex engineering calculations for field use.

**Highlights:** Load calculation, Span determination, Truss analysis, Field use optimization, Engineering calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### OBJ Viewer

[App page](https://appshunter.io/ios/app/obj-viewer-view-3d-models/id6803442606)

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

**In-app purchases:** none


## Frequently asked questions

### Is iTruss free?

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

### Is OBJ Viewer free?

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

### Which is updated more often, iTruss or OBJ Viewer?

iTruss ships an update every 23 months, and OBJ Viewer every 6 days. Most recently, iTruss was updated on October 2, 2026 and OBJ Viewer on October 7, 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.*