# Cyclotron vs OpEvol

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.

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.

## The numbers

| Metric | Cyclotron | OpEvol |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.6 (153 ratings)](https://appshunter.io/ios/app/cyclotron/id437961443/reviews)** | — |
| Number of ratings | **153** | — |
| Positive reviews | **63.2% of reviews** | 27.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 22 months |
| Monetization | **Free** | Paid |
| Size | 6 MB | 3 MB |
| Requires iOS | **8.1** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [PDJ Apps](https://appshunter.io/developer/290231771) | [Muddlegeist](https://appshunter.io/developer/701677888) |

## What reviewers say

### Cyclotron

[App page](https://appshunter.io/ios/app/cyclotron/id437961443)

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.

**Highlights:** Interactive particle simulation, Multi-touch particle behavior, Visually stimulating, Engaging for kids, Time-killing entertainment

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🌟 Mesmerizing visuals
- 👍 Simple and intuitive
- 💡 Unique multitouch interactions
- 🎨 Vibrant color palette
- 🎨 Customizable background

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🔍 Limited functionality
- 🕰️ Gets boring after a while
- 🤢 Can cause motion sickness
- 💰 Not worth the price for some

**Reported bugs**

- Compatibility issues on older devices
- Inconsistent performance after updates
- Delayed or unresponsive touch inputs

**Requested features**

- More customization options
- Additional visual modes or effects
- Screenshot/photo capture capability
- Ability to change movement speed
- Integration with music playback


### OpEvol

[App page](https://appshunter.io/ios/app/opevol/id788355019)

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.

**Highlights:** Animated geometric patterns, Op Art inspired visuals, Psychedelic color displays, Interactive visual play, Air Display compatibility

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpEvol Annual Subscription | $6.99 | per year |


## Frequently asked questions

### Is Cyclotron free?

Cyclotron costs $1.99, with no in-app purchases.

### Is OpEvol free?

OpEvol is free to download, with in-app purchases available.

### Do Cyclotron or OpEvol have ads?

Neither Cyclotron nor OpEvol shows ads.

### Which is updated more often, Cyclotron or OpEvol?

Cyclotron ships an update every 16 months, and OpEvol every 22 months. Most recently, Cyclotron was updated on October 12, 2026 and OpEvol on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*