# OpEvol vs Countdown & Memories

The clearest difference is in-app purchases: Countdown & Memories at none against OpEvol's 1. Countdown & Memories also leads on update cadence (every 2 months vs every 22 months) and iOS requirement (18.6 vs 26.0). On price, ads and device support there is nothing between them.

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

OpEvol ships an update every 22 months, Countdown & Memories every 2 months. The most recent releases landed on August 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | OpEvol | Countdown & Memories |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 27.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 3 MB | 53 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | **iPhone, iPad, Apple TV** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Muddlegeist](https://appshunter.io/developer/701677888) | [Mario Fischer](https://appshunter.io/developer/866086599) |

## 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 |


### Countdown & Memories

[App page](https://appshunter.io/ios/app/countdown-and-memories/id1516643575)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is OpEvol free?

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

### Is Countdown & Memories free?

Countdown & Memories is free to download, with no in-app purchases.

### Do OpEvol or Countdown & Memories have ads?

Neither OpEvol nor Countdown & Memories shows ads.

### Which is updated more often, OpEvol or Countdown & Memories?

OpEvol ships an update every 22 months, and Countdown & Memories every 2 months. Most recently, OpEvol was updated on August 19, 2026 and Countdown & Memories on September 20, 2026.

---

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