# LensFactor

> Calculates lens factor, screen size, and projector distance for display setups. (iPhone/iPad app by Bart van Stiphout.)

- Source: https://appshunter.io/ios/app/lensfactor/id370376269 (this page in markdown: same URL + `.md`)
- Developer: [Bart van Stiphout](https://appshunter.io/developer/368100168)
- Category: Productivity, Entertainment
- Price: $1.99
- Rating: 5.00/5 from 2 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 1 MB
- Languages: American English
- Released: 2010-05-05
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/lensfactor/id370376269/reviews.md

## What is LensFactor?

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

## Key features

- 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

## Chart rankings

- #199 in Top Paid · Productivity (US App Store)

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/lensfactor/id370376269/reviews.md

### 1/5 — Ne fonctionne pas !!

*2022-02-24, version 1.50*

J’ai acheté cette appli pour rien car elle ne fonctionne pas avec mon iPhone 6. Je souhaite me faire rembourser, merci !

### 4/5 — Problème depuis mise à jour

*2020-03-03, version 1.50*

Depuis que j’ai téléchargé la nouvelle mise à jour l’application de fonctionne plus. Dommage elle était très pratique.
Cordialement

### 5/5 — Does what says on the tin!

*2018-04-13*

Clean and uncluttered interface, focused just on what you need for lens throw ratios, screen sizes, distances.

I should point out that all calculations assume a flat screen with a straight-on projector.

### 5/5 — Great tool and soon to have 16:10

*2016-05-16, version 1.3*

I have used this application multiple times to calculate lens throw distances based on screen size and to calculate screen size possibilities based on distance. It works very well. It saves a lot of time and guessing for those of us that have a math disability. An invaluable tool for projection calculations.

### 4/5 — Love it... A library would make it perfect!

*2012-12-07, version 1.0*

I love this app and use it all the time. The only thing I'd love to se to put this app over the top would be a library where I could store all my lenses with their related zoom ranges. Maybe even also a library for my screen setups. I find myself always having to look up my various lens specs. A library would be fantastic!

### 5/5 — Simple et efficace

*2012-08-06, version 1.0*

Une application utile et bien conçue!

### 5/5 — Exactly what I was looking for

*2010-09-26, version 0*

Works great, can get focal distances when setting up a new projector, verify screen sizes when ordering a new screen, determine screen size limitations with various lens ratios, both fixed and zoom. A great tool for an AV installer of projection equipment.

### 5/5 — Do the work

*2010-08-20, version 0*

Simple, usefull, cheap

App is easy to use, any kind of measures can be used (meters, foot, cm (...) has long the measures you enter are all the same.

## Frequently asked questions about LensFactor

### What can LensFactor calculate?

LensFactor can calculate the lens factor when screen size and projector distance are known. It can also determine screen size or projector distance if the lens factor(s) and one other variable are provided.

### How much does LensFactor cost?

LensFactor is a paid application, priced at $1.99. This one-time purchase grants you access to all its calculation features.

### Is LensFactor available on Android?

LensFactor is currently available for iPhone OS devices, including iPhone, iPad, and iPod. Information regarding Android availability is not provided.

### How often is LensFactor updated?

The latest version of LensFactor, 1.50, was released on February 11, 2020. While updates are not frequent, the app has remained stable since its last update.

### What is the age rating for LensFactor?

LensFactor has an age rating of 4+, making it suitable for a wide range of users. It is a straightforward utility application.

### Does LensFactor have ads?

No, LensFactor does not contain advertisements. As a paid application, it offers an ad-free experience for its users.

### What are the user reviews like for LensFactor?

LensFactor has received excellent user feedback, with an average rating of 5.0 stars from 2 ratings. This suggests a high level of user satisfaction with its functionality.

### Can LensFactor integrate with other apps?

The provided information does not indicate any integration capabilities with other applications. LensFactor functions as a standalone calculation tool.

## Version history (last 5 releases)

### 1.50 — 2020-02-11

- Improved Dark Theme
- Minor bugfixes

### 1.31 — 2016-10-22

- Bugfix: The aspect in the distance tab was stuck on 16:9

### 1.3 — 2016-05-15

- Added Support for 16:10
- Now looks better on 4,7 and 5,5 inch devices

### 1.2 — 2015-10-21

- Fixed Crash on iOS 9
- Now scales better with iPhones 5(s), 6(s) and 6(s) Plus

### 1.0 — 2010-05-05

No release notes.

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## More apps by Bart van Stiphout

- [Fixture Tester](https://appshunter.io/ios/app/fixture-tester/id368100165)
- [FocusRemote](https://appshunter.io/ios/app/focusremote/id394880913)
- [PatchPrinter](https://appshunter.io/ios/app/patchprinter/id1580200793)
- [FixtureTester Lite](https://appshunter.io/ios/app/fixturetester-lite/id6459055291)

All apps by Bart van Stiphout: https://appshunter.io/developer/368100168

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*