# Optical Illusions vs Crush Select

The clearest difference is ads: Crush Select at none against Optical Illusions's shown. Crush Select also leads on update cadence (every 4 days vs every 19 months) and iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Optical Illusions ships an update every 19 months, Crush Select every 4 days. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Optical Illusions | Crush Select |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 149 MB | 91 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Rocketship Studios LLP](https://appshunter.io/developer/1456752660) | [艳萍 修](https://appshunter.io/developer/1866559828) |

## What reviewers say

### Optical Illusions

[App page](https://appshunter.io/ios/app/optical-illusionsbrain-teaser/id1555733337)

Engage with a collection of mind-bending visual puzzles designed to challenge your perception and cognitive skills. Explore numerous optical illusions that will test your brain power and visual acuity in a fun and engaging way.

**Highlights:** Hundreds of optical illusion challenges, Spot trick questions and hidden traps, Minimal design for illusion clarity, Time-limited challenges, Suitable for all ages, IQ training and mind games

**In-app purchases:** none


### Crush Select

[App page](https://appshunter.io/ios/app/crush-select/id6758691715)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optical Illusions free?

Optical Illusions is free to download, with no in-app purchases.

### Is Crush Select free?

Crush Select is free to download, with no in-app purchases.

### Do Optical Illusions or Crush Select have ads?

Optical Illusions shows ads; Crush Select does not.

### Which is updated more often, Optical Illusions or Crush Select?

Optical Illusions ships an update every 19 months, and Crush Select every 4 days. Most recently, Optical Illusions was updated on October 13, 2026 and Crush Select on October 4, 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.*