# OpEvol vs Prism Toy

The clearest difference is price: OpEvol at Free against Prism Toy's $0.99. Prism Toy's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 22 months). On ads, monetization model and device support there is nothing between them.

OpEvol is free to download; Prism Toy costs $0.99 up front. OpEvol sells 1 in-app purchase, starting at $6.99 per year. Prism Toy asks for nothing beyond the download.

OpEvol ships an update every 22 months, Prism Toy monthly. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | OpEvol | Prism Toy |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.5 (75 ratings)](https://appshunter.io/ios/app/prism-toy/id1405930340/reviews)** |
| Number of ratings | — | **75** |
| Positive reviews | 27.3% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 22 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 3 MB | 15 MB |
| Requires iOS | 26.0 | **10.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Muddlegeist](https://appshunter.io/developer/701677888) | [PDJ Apps](https://appshunter.io/developer/290231771) |

## What reviewers say

### 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 |


### Prism Toy

[App page](https://appshunter.io/ios/app/prism-toy/id1405930340)

Interact with a virtual prism and light source to create and manipulate rainbows. Control light spread with one finger and prism rotation/size with two fingers.

**Highlights:** Virtual prism interaction, Light source manipulation, Rainbow generation, One-finger light control, Two-finger prism control

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

**In-app purchases:** none


## Frequently asked questions

### Is OpEvol free?

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

### Is Prism Toy free?

Prism Toy costs $0.99, with no in-app purchases.

### Do OpEvol or Prism Toy have ads?

Neither OpEvol nor Prism Toy shows ads.

### Which is updated more often, OpEvol or Prism Toy?

OpEvol ships an update every 22 months, and Prism Toy monthly. Most recently, OpEvol was updated on October 15, 2026 and Prism Toy on October 8, 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.*