Cyclotron vs OpEvol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cyclotron
Interact with a dynamic particle system by touching the screen. Use multiple fingers to alter particle behavior for a visually stimulating experience. Ideal for entertainment and keeping children engaged.
- Interactive particle simulation
- Multi-touch particle behavior
- Visually stimulating
- Engaging for kids
- Time-killing entertainment
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Cyclotron is a fun and satisfying particle app. Touch the screen and the particles go wild. Using multiple fingers changes the way the particles behave. Great to mess with when you're bored and have some time to kill, need visual stimulation or want to keep the kids busy.
OpEvol
Experience a dynamic, ever-changing display of psychedelic visuals inspired by 1960s Op Art. This app creates animated fields of geometric colors and contrasts for passive viewing or interactive play.
- Animated geometric patterns
- Op Art inspired visuals
- Psychedelic color displays
- Interactive visual play
- Air Display compatibility
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Inspired by Op Art of the 1960s, OpEvol takes the geometric play of colors and contrasts and animates them into a moving field of ever-changing, optical, kinetic abstraction. It's for staring at. It's for sending to Air Display. Or an external monitor. Or a projector. It's something mesmerizing to design and watch evolve, or just leave on in the background as art. OpEvol Pro is an auto-renewing annual subscription (price shown in the app). Payment is charged to your Apple ID at purchase, and it renews automatically unless canceled at least 24 hours before the end of the period. Manage or cancel anytime in your Apple ID settings. Privacy Policy: https://muddlegeist.com/opevol/privacy Terms of Use (EULA): https://muddlegeist.com/opevol/terms
Screenshots
Verdict
The clearest difference is price: OpEvol at Free against Cyclotron's $1.99. Cyclotron's advantage is review sentiment (63% vs 27%) and in-app purchases (none vs 1). On update cadence, 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
OpEvol is free to download; Cyclotron costs $1.99 up front. OpEvol sells 1 in-app purchase, starting at $6.99 per year. Cyclotron asks for nothing beyond the download.
Cyclotron ships an update every 16 months, OpEvol every 22 months. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.
| Parameter | Cyclotron | OpEvol |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.6 (153 ratings) — better | — |
| Positive reviews | 63.2% of reviews — better | 27.3% of reviews |
| Number of ratings | 153 — better | — |
| Update frequency | Every 16 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Requires iOS | 8.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | PDJ Apps | Muddlegeist |
Customer experience
Cyclotron
OpEvol
Bugs and requests
Cyclotron
Reported bugs
3 issues- Compatibility issues on older devices
- Inconsistent performance after updates
- Delayed or unresponsive touch inputs
Requested features
5 requests- More customization options
- Additional visual modes or effects
- Screenshot/photo capture capability
- Ability to change movement speed
- Integration with music playback
OpEvol
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cyclotron
No in-app purchases
OpEvol
- OpEvol Annual Subscription$6.991 Year
