Qalculator vs OSC Deck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
OSC Deck
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OSC Deck turns your iPad into a professional OSC (Open Sound Control) controller. Designed for lighting technicians, audio engineers, and AV professionals who need a reliable, customizable touch interface on stage or in the studio. BUILD YOUR CONTROL SURFACE Drag and drop faders, buttons, knobs, and scene triggers onto any layout Vertical and horizontal faders with automatic orientation on resize Multiple pages for different zones or scenes Logo widget for branding your control surface SCENE CONTROL Save and recall complete lighting states with one tap Smooth fade transitions with configurable fade time Edit scenes inline — select faders, set levels, save Queue system for conflict-free scene transitions MULTI-DEVICE OSC Connect to multiple OSC devices simultaneously Configurable send and receive ports per device Route specific pages to specific devices Works with any OSC-compatible system: Qlab, ETC, MA, and more THEMES 7 built-in visual themes: Classic, Neon Glow, Warm Analog, Light Studio, Glass Frosted, Industrial, Gold, Ibiza Sunset Custom accent color per fader Theme is saved with each project PROJECT MANAGEMENT Export and import projects as .oscdeck files OSC device settings saved with the project Auto-versioned file names on export OSC Deck is optimized for iPad in landscape mode, giving you the maximum screen space for your control surface. Requires a local network connection to communicate with OSC devices. Compatible with iOS 16 and later.
Screenshots
Verdict
The clearest difference is price: OSC Deck at Free against Qalculator's $2.99. OSC Deck also leads on update cadence (daily vs every 4 months). On ads, 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
OSC Deck is free to download; Qalculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Qalculator ships an update every 4 months, OSC Deck daily. The most recent releases landed on July 17, 2026 and September 13, 2026 respectively.
| Parameter | Qalculator | OSC Deck |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 4 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | QConcept GmbH & Co. KG | jordy stultiens |
In-app purchases
Qalculator
No in-app purchases
OSC Deck
No in-app purchases









