ProjectorCalc vs SpectraMania
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ProjectorCalc
This utility app helps lighting technicians and projectionists calculate projected image dimensions. It determines image width, height, diagonal length, brightness, area, and pixel density based on projector and location details. It also estimates keystone distortion.
- Calculate image width, height, and diagonal length
- Determine brightness in Nits
- Calculate total projected area
- Compute pixels per inch
- Estimate keystone distortion
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Winner of the 2010 Live Design Projection Product of the Year - Software/App Category ProjectorCalc is a program for professional lighting technicians and projectionists. Its primary purpose is to determine the size of a projected image given various information about the projector and it's location. ProjectorCalc allows users to enter details for a projector and its location in relation to a projection surface. ProjectorCalc will calculate image width, image height, diagonal length, brightness in Nits, total projected area, and how many pixels per inch the projected image will be. Additionally, ProjectorCalc can give you an estimate of how much keystone distortion will occur by calculating the length of each side of the distorted image.
SpectraMania
This application offers high-resolution, real-time 3D spectrum analysis of audio signals. It allows for precise measurements, playback from specific points, and saving audio recordings. Users can customize analysis parameters and interact with various display views.
- High-resolution 3D spectrum analysis
- Precise pause mode measurement
- Audio playback from cursor
- Save audio as WAV
- Configurable analysis parameters
- Portrait and Landscape support
- Interactive touch gestures
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Top performance, high resolution real-time spectrum analysis of audio signals Precise 3D spectrum measurement in pause mode, with the ability to target specific points in the spectrum Audio playback from a movable cursor position in pause mode Saving of recorded audio as a standard WAV file, with the option to select a specific portion of the signal Fully configurable spectrum analysis parameters Spectrum display supports both Portrait and Landscape orientations Interactive adjustment of Spectrum, Waveform, and Equalizer view areas via touch gestures Real-time calculation and display of peak frequency
Screenshots
Verdict
The clearest difference is rating: ProjectorCalc at 5.0 against SpectraMania's 4.0. ProjectorCalc also leads on price ($2.99 vs $7.99) and iOS requirement (9.2 vs 16.0). SpectraMania's advantage is review sentiment (75% vs 38%) and update cadence (every 6 months vs every 49 months). On ratings volume, ads, in-app purchases and monetization model 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
ProjectorCalc costs $2.99 and SpectraMania $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ProjectorCalc holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews complicate that: 38% of ProjectorCalc's written reviews are positive against 75% of SpectraMania's, so the app with the better star average is not the one people write more warmly about.
ProjectorCalc ships an update every 49 months, SpectraMania every 6 months. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.
| Parameter | ProjectorCalc | SpectraMania |
|---|---|---|
| Price | $2.99 — better | $7.99 |
| Rating | 5.0 (2 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 37.5% of reviews | 75.0% of reviews — better |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 49 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.2 — better | 16.0 |
| Further details — not scored | ||
| Size | 10 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | D!HV Lighting | Sergey Andrzheevskiy |
Customer experience
ProjectorCalc
SpectraMania
In-app purchases
ProjectorCalc
No in-app purchases
SpectraMania
No in-app purchases
