ProjectorCalc vs GenR8
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.
GenR8
Generate professional test patterns for display calibration and validation. Supports external displays, audio testing, and HDR signals. Ideal for video engineers, filmmakers, and content creators needing precise visual and audio analysis on the go.
- 28+ professional test patterns
- External display support (USB-C, AirPlay)
- HDR pattern support
- Audio test tones and live metering
- Precision controls and customizable overlays
- Export test patterns (PNG, PDF, JPG, TIFF)
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KEY FEATURES: * 28+ Professional Test Patterns - SMPTE color bars, calibration grids, convergence patterns, HDR test signals, luma stepping, IRE patterns, and more * External Display Support - Connect via USB-C to HDMI/DisplayPort or AirPlay. Full 1:1 pixel mapping for accurate calibration * AV Sync Test * Audio Test Tones - Sine, square, sawtooth, and white noise waveforms from 20Hz to 20kHz with live stereo metering * HDR Pattern Support - PQ curve test patterns, HDR color bars, and BT.2111 UHD patterns for HDR display validation * Precision Controls - Customizable aspect ratio overlays, diagnostic crosshairs, border guides, and adjustable scanning color bars * Live Audio Metering - Real-time L/R level meters with peak detection for audio signal monitoring * iPad Optimized - Split-view interface with pattern library sidebar and full-screen preview * Customizable Overlays - Display resolution info, clock, date, custom text, and diagnostic guides * Export Test Patterns in PNG, PDF, JPG, TIFF PERFECT FOR: - Video engineers calibrating displays - AV technicians testing signal chains - Filmmakers validating monitor accuracy - Content creators ensuring color fidelity - Anyone needing professional test patterns on the go DISPLAYS SUPPORTED: *External monitors, projectors, TVs, and broadcast displays via HDMI, DisplayPort, or AirPlay. Made with precision for professionals who demand accuracy.
Screenshots
Verdict
ProjectorCalc and GenR8 both sit at 5.0 stars, but that hides the real split: 100% of GenR8's written reviews are positive against 38% of ProjectorCalc's. GenR8 also leads on update cadence (weekly vs every 49 months) and ratings volume (9 vs 2). ProjectorCalc's advantage is price ($2.99 vs $19.99) and iOS requirement (9.2 vs 17.0). On rating, 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 GenR8 $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for ProjectorCalc against 4.9 for GenR8. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews are what separate them: 38% of ProjectorCalc's written reviews are positive against 100% of GenR8's.
ProjectorCalc ships an update every 49 months, GenR8 weekly. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.
| Parameter | ProjectorCalc | GenR8 |
|---|---|---|
| Price | $2.99 — better | $19.99 |
| Rating | 5.0 (2 ratings) — better | 4.9 (9 ratings) |
| Positive reviews | 37.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 49 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 10 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | D!HV Lighting | Christopher Van Hoose |
Customer experience
ProjectorCalc
GenR8
In-app purchases
ProjectorCalc
No in-app purchases
GenR8
No in-app purchases
