Comparison

VOSC Visual Particle Synth vs Rotation

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Visual particle synthesis
  • Manipulate oscillator size, shape, frequency
  • Create moving patterns and textures
  • Explore visual harmony
  • Differential motion principles
  • Harmonic resonances
Features
Read full description

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.

About

Rotation

Features
Read full description

Rotation is a visual art application based on the phenakistoscope principle, allowing you to easily create fascinating dynamic visual effects. By placing images on a rotating disc and utilizing the persistence of vision phenomenon, it produces magical visual experiences. 【Main Features】 • 77 Pre-installed Images: The app includes various specially selected phenakistoscope and persistence of vision effect images, ready to use • Custom Images: Import your own images from photo library to create personalized visual effects • Flexible Parameter Adjustment: Control frame rate, rotation angle, rotation direction, image size, and position • Rich Preset Styles: Offers five preset styles including modern, classic, dynamic, natural, and abstract • Multi-language Support: Compatible with 33 languages, including English, Chinese, Japanese, Korean, and more 【Parameter Details】 • Frame Rate: Controls the number of frames displayed per second, ranging from 1-60 fps • Rotation Angle: Adjusts the rotation angle of each frame, ranging from 1°-180° • Rotation Direction: Choose between clockwise or counterclockwise rotation • Image Size: Controls the display ratio of images on the disc, ranging from 100%-300% • Alignment: Sets the position of images on the disc, supporting both horizontal and vertical alignment 【Persistence of Vision】 Persistence of vision is a physiological characteristic of the human eye. When we see an image, the impression formed on the retina doesn't disappear immediately but persists for a short period (about 0.1-0.4 seconds). This phenomenon allows us to perceive rapidly presented static images as continuous smooth motion. 【Phenakistoscope Principle】 The phenakistoscope is an optical toy invented in the 19th century that creates visual illusions through rotation, reflection, and optical principles. Combined with the persistence of vision effect, when the disc rotates rapidly, it creates a superimposed effect on the retina, producing stunning symmetrical and fractal patterns. 【Application Scenarios】 • Visual Art Creation: Designers can create unique visual effects • Educational Demonstrations: Teachers can explain the principle of persistence of vision • Mental Relaxation: Watching the rotation effects can help relax the mind • Entertainment: Add fun to family gatherings or friend meetups 【Usage Tips】 • For phenakistoscope effect images, it's recommended to set the rotation angle to 360° divided by the number of evenly divided portions in the image • Adjusting the image size to 200%-300% can achieve a more concentrated visual effect • Try different rotation directions to produce different visual experiences Whether you're a visual art enthusiast, designer, or just someone who enjoys interesting visual experiences, Rotation can bring you a unique visual treat. Download the app and start your phenakistoscope visual journey!

Screenshots

VOSC Visual Particle Synth4 screens
Rotation4 screens

Verdict

The call

The clearest difference is update cadence: Rotation at every 3 days against VOSC Visual Particle Synth's every 38 months. Rotation also leads on price ($3.99 vs $4.99). VOSC Visual Particle Synth's advantage is chart position (#99 vs unranked) and iOS requirement (12.0 vs 17). 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

CostPrice · In-app purchases · Ads · Monetization

VOSC Visual Particle Synth costs $4.99 and Rotation $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

VOSC Visual Particle Synth ships an update every 38 months, Rotation every 3 days. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 7 level
VOSC Visual Particle Synth versus Rotation: the parameters behind the verdict, then further details
ParameterVOSC Visual Particle SynthRotation
Price$4.99$3.99 — better
Rating4.5 (27 ratings) — better—
Positive reviews62.2% of reviews—
Number of ratings27 — better—
Update frequencyEvery 38 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
Best chart rank#99 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17
Further details — not scored
Size123 MB37 MB
Age rating4+4+
DeveloperDuncan Holby思明 陈

In-app purchases

None

VOSC Visual Particle Synth

No in-app purchases

None

Rotation

No in-app purchases

Questions

Is VOSC Visual Particle Synth free?
VOSC Visual Particle Synth costs $4.99, with no in-app purchases.
Is Rotation free?
Rotation costs $3.99, with no in-app purchases.
Do VOSC Visual Particle Synth or Rotation have ads?
Neither VOSC Visual Particle Synth nor Rotation shows ads.
Which is updated more often, VOSC Visual Particle Synth or Rotation?
VOSC Visual Particle Synth ships an update every 38 months, and Rotation every 3 days. Most recently, VOSC Visual Particle Synth was updated on September 27, 2026 and Rotation on September 21, 2026.

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