# Optical Illusions vs Robotun

The clearest difference is ads: Robotun at none against Optical Illusions's shown. Robotun also leads on update cadence (daily vs every 19 months). On price, in-app purchases, device support and iOS requirement 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, Robotun daily. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Optical Illusions | Robotun |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Daily** |
| Monetization | Ad-supported | — |
| Size | 149 MB | 11 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Rocketship Studios LLP](https://appshunter.io/developer/1456752660) | [Yuriy Bruskov](https://appshunter.io/developer/1735183966) |

## 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


### Robotun

[App page](https://appshunter.io/ios/app/robotun/id6538715314)

**In-app purchases:** none


## Frequently asked questions

### Is Optical Illusions free?

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

### Is Robotun free?

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

### Do Optical Illusions or Robotun have ads?

Optical Illusions shows ads; Robotun does not.

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

Optical Illusions ships an update every 19 months, and Robotun daily. Most recently, Optical Illusions was updated on October 13, 2026 and Robotun on October 5, 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.*