# Cluetivity vs Optical Illusions

The clearest difference is ads: Cluetivity at none against Optical Illusions's shown. Cluetivity also leads on update cadence (every 4 months vs every 19 months) and iOS requirement (11.0 vs 15.0). Optical Illusions's advantage is device support (3 vs 1). On price and in-app purchases there is nothing between them.

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

Cluetivity ships an update every 4 months, Optical Illusions every 19 months. The most recent releases landed on September 16, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | Cluetivity | Optical Illusions |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 19 months |
| Monetization | — | Ad-supported |
| Size | 339 MB | 149 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [lifeaction games](https://appshunter.io/developer/546806470) | [Rocketship Studios LLP](https://appshunter.io/developer/1456752660) |

## What reviewers say

### Cluetivity

[App page](https://appshunter.io/ios/app/cluetivity/id1397802240)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Cluetivity free?

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

### Is Optical Illusions free?

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

### Do Cluetivity or Optical Illusions have ads?

Optical Illusions shows ads; Cluetivity does not.

### Which is updated more often, Cluetivity or Optical Illusions?

Cluetivity ships an update every 4 months, and Optical Illusions every 19 months. Most recently, Cluetivity was updated on September 16, 2026 and Optical Illusions on June 9, 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.*