VOSC Visual Particle Synth vs PenDraw
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VOSC Visual Particle Synth
Create dynamic visual art by manipulating on-screen particles. Explore harmonic resonances and generate endless moving patterns and textures through oscillator control. Inspired by the principles of visual harmony and differential motion.
- Visual particle synthesis
- Manipulate oscillator size, shape, frequency
- Create moving patterns and textures
- Explore visual harmony
- Differential motion principles
- Harmonic resonances
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VOSC is best understood as a visual analogue of a traditional sound synthesizer. The medium of synthesis, rather than sound waves, is a vast quantity of on screen particles. By manipulating the size, shape, and frequency of the oscillators, an endless variety of moving patterns and textures can be created. A primary mechanism at work in VOSC is the phenomenon of visual harmony as explored by the computer graphics pioneer and visual artist John Whitney in the mid 20th century. The oscillators of VOSC operate in accordance with Whitney's principle of differential motion, giving rise to harmonic resonances as their frequencies move across whole ratios.
PenDraw
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PenDraw lets you turn your phone into a motion-controlled pen. By using the device’s motion sensors, you can draw lines and shapes on the screen simply by moving your phone. PenDraw creates a minimal, distraction-free canvas designed for experimentation, play, and creative exploration. Features: • Motion-controlled drawing using your phone • Smooth real-time line rendering • Clean button to reset the canvas instantly • Simple, minimal interface • No account required • No data collected PenDraw is designed for creative experimentation and visual play. Just move your phone and start drawing.
Screenshots
Verdict
The clearest difference is price: PenDraw at Free against VOSC Visual Particle Synth's $4.99. PenDraw also leads on update cadence (every 9 months vs every 38 months). VOSC Visual Particle Synth's advantage is chart position (#93 vs unranked) and iOS requirement (12.0 vs 18.5). On ads, in-app purchases 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
PenDraw is free to download; VOSC Visual Particle Synth costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VOSC Visual Particle Synth ships an update every 38 months, PenDraw every 9 months. The most recent releases landed on September 27, 2026 and September 16, 2026 respectively.
| Parameter | VOSC Visual Particle Synth | PenDraw |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.5 (27 ratings) — better | — |
| Positive reviews | 62.2% of reviews | — |
| Number of ratings | 27 — better | — |
| Update frequency | Every 38 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Best chart rank | #93 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 123 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Duncan Holby | EMIRHAN SIMSEK |
In-app purchases
VOSC Visual Particle Synth
No in-app purchases
PenDraw
No in-app purchases
Questions
Is VOSC Visual Particle Synth free?
Is PenDraw free?
Do VOSC Visual Particle Synth or PenDraw have ads?
Which is updated more often, VOSC Visual Particle Synth or PenDraw?
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