iTruss vs LensFactor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iTruss
Calculate structural loads, spans, and truss requirements for construction projects directly from your iPhone. This tool simplifies complex engineering calculations for field use.
- Load calculation
- Span determination
- Truss analysis
- Field use optimization
- Engineering calculations
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Determine load, span or truss needed for your job in the field with this exciting new iPhone® application from XSF. EULA link https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
LensFactor
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.
- 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
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LensFactor is an application for the iPhone OS which has 3 basic functions: - Calculate the lens factor when the screen size and projector distance is known - Calculate the screen size when the lens factor(s) and projector distance is known - Calculate the projector distance when the lens factor(s) and screen size is known
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iTruss | LensFactor |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.1 (15 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | 15 — better | 2 |
| Update frequency | Every 23 months — better | Every 24 months |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 70 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Xtreme Structures & Fabrication LLC | Bart van Stiphout |
Customer experience
iTruss
LensFactor
In-app purchases
iTruss
No in-app purchases
LensFactor
No in-app purchases
