ProjectorPro vs Quantum VJ HD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ProjectorPro
Determine if a projector and screen will fit your space. Access a comprehensive database of projectors with detailed throw distance specifications. Stay updated with new projector releases through in-app updates.
- Projector fit calculation
- Screen size calculation
- Extensive projector database
- Throw distance specifications
- In-app updates for new models
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Will your projector fit the available space? What about your screen? This app will help you find out! From the same developers who brought you the web-based Projection Calculator Pro at ProjectorCentral.com. You will have access to every projector in the ProjectorCentral database with throw distance specifications. Projectors released after purchase of this app will require an update to be purchased from within the app.
Quantum VJ HD
This app creates dynamic visual effects synchronized with audio input from your microphone or line-in. It allows real-time mixing with your camera feed and supports custom image uploads. Control various visual parameters with intuitive multitouch gestures.
- Audio-reactive graphics
- Real-time camera stream mixing
- Multitouch parameter control
- Custom codeset image upload
- Microphone and Line-in audio input
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Quantum VJ HD is a simple glitch-style audio visualizer. It can receive sound from the microphone or from the Line-in port (depends on the system settings). Sound will be converted to the graphic elements byte by byte. The final video can be mixed with the camera stream in real time. iTunes File Sharing and Wi-Fi can be used, if you want to upload your own codeset images to the app. [ Multitouch control ] (pair of parameters for each new touch) 1st Touch - changing the Mode (horizontally) and the Power (vertically) parameters. 2nd Touch - changing the Color (horizontally) and the Noise (vertically) parameters. 3rd Touch - changing the Camera (horizontally) and the Resolution (vertically) parameters. 4th Touch - changing the Brightness (horizontally) and the Speed (vertically) parameters. Press on the top left corner to hide/show the control panel (fullscreen mode ON/OFF).
Screenshots
Verdict
The clearest difference is review sentiment: Quantum VJ HD at 100% against ProjectorPro's 45%. Quantum VJ HD also leads on rating (5.0 vs 3.1) and in-app purchases (none vs 1). ProjectorPro's advantage is update cadence (every 10 months vs every 35 months) and iOS requirement (10.0 vs 12.0). On price, ratings volume, ads 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
ProjectorPro costs $1.99 and Quantum VJ HD $1.99 up front. ProjectorPro sells 1 one-off in-app purchase. Quantum VJ HD asks for nothing beyond the download.
Quantum VJ HD holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 23 and 10 respectively. Written reviews point the same way: 45% of ProjectorPro's written reviews are positive against 100% of Quantum VJ HD's.
ProjectorPro ships an update every 10 months, Quantum VJ HD every 35 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.
| Parameter | ProjectorPro | Quantum VJ HD |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 3.1 (23 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 45.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 23 — better | 10 |
| Update frequency | Every 10 months — better | Every 35 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #195 — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 6 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | ProjectorCentral | Alexander Zolotov |
Customer experience
ProjectorPro
Quantum VJ HD
In-app purchases
ProjectorPro
- complete projector data update$0.99
Quantum VJ HD
No in-app purchases
