# iTruss vs LensFactor

The clearest difference is price: iTruss at Free against LensFactor's $1.99. iTruss also leads on ratings volume (15 vs 2). LensFactor's advantage is rating (5.0 vs 4.1). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

iTruss is free to download; LensFactor costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LensFactor holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: iTruss has 15 ratings behind it against 2, so its average is the more settled of the two.

iTruss ships an update every 23 months, LensFactor every 24 months. The most recent releases landed on June 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | iTruss | LensFactor |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.1 (15 ratings)](https://appshunter.io/ios/app/itruss/id363376468/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lensfactor/id370376269/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | — | 88.9% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | **Every 23 months** | Every 24 months |
| Monetization | **Free** | Paid |
| Size | 70 MB | 1 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xtreme Structures & Fabrication LLC](https://appshunter.io/developer/363376471) | [Bart van Stiphout](https://appshunter.io/developer/368100168) |

## 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


### LensFactor

[App page](https://appshunter.io/ios/app/lensfactor/id370376269)

This app helps calculate lens factors, screen sizes, and projector distances based on known variables. It's a utility for professionals or enthusiasts needing precise measurements for display setups.

**Highlights:** Calculate lens factor, Calculate screen size, Calculate projector distance, Input screen size and projector distance, Input lens factor and projector distance, Input lens factor and screen size

**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 LensFactor free?

LensFactor costs $1.99, with no in-app purchases.

### Which has better reviews, iTruss or LensFactor?

LensFactor is rated higher. iTruss averages 4.1 out of 5 from 15 ratings, while LensFactor averages 5.0 from 2 ratings.

### Which is updated more often, iTruss or LensFactor?

iTruss ships an update every 23 months, and LensFactor every 24 months. Most recently, iTruss was updated on June 10, 2026 and LensFactor on September 21, 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.*