LensFactor vs 3Display
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
3Display
This app allows users to create and display 3D fan art. It offers a platform for showcasing creative 3D models and designs. Explore a gallery of unique fan-made creations.
- 3D fan art creation
- 3D model display
- Showcase creative designs
- Gallery of fan-made creations
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Fan Display
Screenshots
Verdict
The clearest difference is review sentiment: LensFactor at 89% against 3Display's 0%. LensFactor also leads on rating (5.0 vs 2.3) and iOS requirement (11.0 vs 15.0). 3Display's advantage is price (Free vs $1.99) and update cadence (every 4 weeks vs every 24 months). On ratings volume, ads, in-app purchases and device support 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
3Display 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 2.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 89% of LensFactor's written reviews are positive against 0% of 3Display's.
LensFactor ships an update every 24 months, 3Display every 4 weeks. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.
| Parameter | LensFactor | 3Display |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 88.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 24 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Bart van Stiphout | 华胜 张 |
Customer experience
LensFactor
3Display
In-app purchases
LensFactor
No in-app purchases
3Display
No in-app purchases
