Quantum VJ HD vs ca
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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).
ca
This app transforms your camera's live feed into unique, pixelated images and videos using cellular automata. Customize patterns with various color palettes, directions, rules, and resolutions for a retro aesthetic.
- Cellular automaton image interpretation
- Pixelated output with unique patterns
- Black and white or retro color palettes
- Selfie and split camera modes
- Video recording
- Customizable automaton parameters
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The successor of probably the nerdiest camera app ever made, ca-mera+ uses a cellular automaton to interpret the colors of your camera stream. The resulting images are pixelated and contain unique patterns created by cellular automata. The output can be black and white, or one of several retro color palettes (CGA 4 and 16 colors, 1-bit RGB, etc.). This app provides "selfie" and "split" modes, records video, and lets you change the appearance of the pictures by controlling the automaton application direction, its rules, the resolution, the input brightness, and the input fidelity (i.e. to which extent the cellular automaton is allowed to run freely).
Screenshots
Verdict
The clearest difference is update cadence: ca at monthly against Quantum VJ HD's every 35 months. ca also leads on ratings volume (52 vs 10). Quantum VJ HD's advantage is rating (5.0 vs 4.8) and review sentiment (100% vs 89%). 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
Quantum VJ HD costs $1.99 and ca $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Quantum VJ HD holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ca has 52 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 100% of Quantum VJ HD's written reviews are positive against 89% of ca's.
Quantum VJ HD ships an update every 35 months, ca monthly. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.
| Parameter | Quantum VJ HD | ca |
|---|---|---|
| Price | $1.99 — better | $2.99 |
| Rating | 5.0 (10 ratings) — better | 4.8 (52 ratings) |
| Positive reviews | 100.0% of reviews — better | 88.9% of reviews |
| Number of ratings | 10 | 52 — better |
| Update frequency | Every 35 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexander Zolotov | Fritz Menzer |
Customer experience
Quantum VJ HD
ca
In-app purchases
Quantum VJ HD
No in-app purchases
ca
No in-app purchases
