OpEvol vs Prism Toy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Prism Toy
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.
- Virtual prism interaction
- Light source manipulation
- Rainbow generation
- One-finger light control
- Two-finger prism control
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Play with a prism and a light source. Split the light into a rainbow. One finger controls the light and its spread. Two fingers control the rotation location and size of the prism.
Screenshots
Verdict
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.
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; 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.
| Parameter | OpEvol | Prism Toy |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 4.5 (75 ratings) — better |
| Positive reviews | 27.3% of reviews | 50.0% of reviews — better |
| Number of ratings | — | 75 — better |
| Update frequency | Every 22 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Requires iOS | 26.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Muddlegeist | PDJ Apps |
Customer experience
OpEvol
Prism Toy
In-app purchases
OpEvol
- OpEvol Annual Subscription$6.991 Year
Prism Toy
No in-app purchases
