OpEvol vs Zen Diagram
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
Read full descriptionHide full description
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
Zen Diagram
Read full descriptionHide full description
Zen Diagram is a drawing app that allows you to simply create art and erase it. Use it to doodle or relax.
Screenshots
Verdict
The clearest difference is in-app purchases: Zen Diagram at none against OpEvol's 1. Zen Diagram also leads on iOS requirement (14.4 vs 26.0). On price 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
Both are free to download. OpEvol sells 1 in-app purchase, starting at $6.99 per year. Zen Diagram asks for nothing beyond the download.
| Parameter | OpEvol | Zen Diagram |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 27.3% of reviews | — |
| Update frequency | Every 22 months | — |
| Ads | No | — |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Requires iOS | 26.0 | 14.4 — better |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Muddlegeist | Dexter Buxton |
In-app purchases
OpEvol
- OpEvol Annual Subscription$6.991 Year
Zen Diagram
No in-app purchases
