LensPro vs Qalculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LensPro
This utility app assists projectionists with lens calculations for various projector brands. It maintains an updated database of lens information accessible via the internet.
- Lens calculations
- Supports Barco, Christie, Panasonic, Epson, Benq, Mitsubishi, Optoma, Sony
- Online database updates
- Ideal for projectionists
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LensPro is the ideal companion of every projectionist. Lenspro allows the calculations of lenses: Barco - Christie - Panasonic, Digital Projection, Epson, Benq, Mitsubishi,Optoma,Sony. updating the database via the internet
Qalculator
This app provides specialized calculation tools for media professionals in film, TV, theatre, and events. It offers utilities for lighting, projection, cameras, audio, and more, simplifying complex industry tasks.
- Lighting beam calculations
- Projection tools
- Camera distance and focal length calculations
- Audio delay and phase offset calculations
- Display size and bandwidth calculations
- Tap BPM and DIP switch utilities
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Qalculator is a convenient tool for media professionals. Qalculator offers a variety of different calculation tools and utilities all of which are made for tasks often performed within the Film-/TV-, Theatre- and Event Industry. This includes: - Lighting Beam Calculation - Projection Tools - Camera Tools - Audio Tools - Tap BPM - Display Size - DIP Switches - Bandwidth Calculation - Frames To Time This app is designed for professionals such as Sound Engineers, Audio Technicians, Lighting Designers, Lighting Technicians, Lighting Operators, Video Engineers, Video Technicians, Camera Men, Camera Technicians and many more. How big will the projected image be if I use a lens factor of 1,5:1 and have my projector at 32' 5" distance from the screen? Qalculator will help! Want to know which focal length you need to get a close up shot? Qalculator assists you. Ever wanted to know how wide a 103" Screen is? Qalculator delivers the solution at your fingertip. Feedback and feature requests are very welcome! Qalculator does: - Lighting beam diameter calculation - Lighting beam object distance calculation - Video projector image size calculation - Video projection lens factor for given image size and projection distance - Video projection distance for given image size and lens factor - Video projection approximate brightness calculation (lux/fc) - Camera distance for given focal length and field of view - Camera focal length for given distance and field of view - Camera field of view for given object distance and focal length - Camera chip size selector for a variety of different chip sizes - Audio delay time for given distance with respect to temperature - Audio wavelengths and travel times for given frequency with respect to temperature - Audio find phase offset and delay for instance for bass speaker arrays - Display Size calculates the complete dimensions for diagonal screen sizes - Tap BPM tap to calculate the average beats per minute - DIP Switches for DMX addressing of DIP switch based devices - DIP Switch offset to step through the DMX address fixture per fixture - Transfer time calculation for a given file size and bandwidth … and more.
Screenshots
Verdict
The clearest difference is rating: Qalculator at 5.0 against LensPro's 4.4. Qalculator also leads on update cadence (every 4 months vs every 12 months) and review sentiment (90% vs 72%). LensPro's advantage is ratings volume (21 vs 5). On ads, in-app purchases, monetization model 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
LensPro costs $5.99 and Qalculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Qalculator holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 21 and 5 respectively. Written reviews point the same way: 72% of LensPro's written reviews are positive against 90% of Qalculator's.
LensPro ships an update every 12 months, Qalculator every 4 months. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.
| Parameter | LensPro | Qalculator |
|---|---|---|
| Price | $5.99 | $2.99 — better |
| Rating | 4.4 (21 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 72.2% of reviews | 90.0% of reviews — better |
| Number of ratings | 21 — better | 5 |
| Update frequency | Every 12 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 113 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | piXap | QConcept GmbH & Co. KG |
Customer experience
LensPro
Qalculator
In-app purchases
LensPro
No in-app purchases
Qalculator
No in-app purchases
