# OpEvol vs Schrode the Cat

The clearest difference is review sentiment: Schrode the Cat at 100% against OpEvol's 27%. Schrode the Cat also leads on in-app purchases (none vs 1) and update cadence (every 9 months vs every 22 months). On price, ads and monetization model there is nothing between them.

Both are free to download. OpEvol sells 1 in-app purchase, starting at $6.99 per year. Schrode the Cat asks for nothing beyond the download.

OpEvol ships an update every 22 months, Schrode the Cat every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | OpEvol | Schrode the Cat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/schrode-the-cat/id1097450819/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 27.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 9 months** |
| Monetization | Paid | Paid |
| Size | 3 MB | 182 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad, Apple TV | **iPhone, iPad, Mac, Apple TV, Apple Watch** |
| Age rating | 4+ | 9+ |
| Developer | [Muddlegeist](https://appshunter.io/developer/701677888) | [curmi.com](https://appshunter.io/developer/354900328) |

## 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 |


### Schrode the Cat

[App page](https://appshunter.io/ios/app/schrode-the-cat/id1097450819)

This app acts as a fun decision-making tool, answering your yes/no questions with a simple tap. Inspired by a famous physics experiment, it offers playful responses and can even be used within messaging apps. It's available across multiple Apple devices and platforms.

**Highlights:** Yes/No question answering, Decision making tool, Messaging app integration, Watch face complications, Multiple language support, Zombie mode toggle

**Features:** Apple Watch app, iMessage stickers, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is OpEvol free?

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

### Is Schrode the Cat free?

Schrode the Cat is free to download, with no in-app purchases.

### Do OpEvol or Schrode the Cat have ads?

Neither OpEvol nor Schrode the Cat shows ads.

### Which is updated more often, OpEvol or Schrode the Cat?

OpEvol ships an update every 22 months, and Schrode the Cat every 9 months. Most recently, OpEvol was updated on November 1, 2026 and Schrode the Cat on November 2, 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.*