# iTruss vs Sensor3 TPSR

The clearest difference is update cadence: iTruss at every 23 months against Sensor3 TPSR's every 65 months. iTruss also leads on iOS requirement (11.0 vs 13.1). On price, in-app purchases, monetization model 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, Sensor3 TPSR every 65 months. The most recent releases landed on June 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | iTruss | Sensor3 TPSR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (15 ratings)](https://appshunter.io/ios/app/itruss/id363376468/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | **Every 23 months** | Every 65 months |
| Monetization | Free | Free |
| Size | 70 MB | 2 MB |
| Requires iOS | **11.0** | 13.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xtreme Structures & Fabrication LLC](https://appshunter.io/developer/363376471) | [Electronic Theatre Controls, Inc.](https://appshunter.io/developer/318210459) |

## 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


### Sensor3 TPSR

[App page](https://appshunter.io/ios/app/sensor3-tpsr/id1136754164)

Configure dimmers in your dimming system wirelessly. Easily set up dimmers by searching for them or scanning QR codes on outlets. Ideal for quickly identifying, testing, and switching between dimmed and switched modes.

**Highlights:** Wireless dimmer configuration, Network dimmer search, QR code scanning for outlets, Rapid outlet reconfiguration, Testing dimmed and switched modes

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iTruss free?

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

### Is Sensor3 TPSR free?

Sensor3 TPSR is free to download, with no in-app purchases.

### Which is updated more often, iTruss or Sensor3 TPSR?

iTruss ships an update every 23 months, and Sensor3 TPSR every 65 months. Most recently, iTruss was updated on June 10, 2026 and Sensor3 TPSR on September 19, 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.*