# Müller vs Graintouch Pro

The clearest difference is ads: Graintouch Pro at none against Müller's shown. Müller's advantage is iOS requirement (12.0 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.

## The numbers

| Metric | Müller | Graintouch Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | — |
| Size | 30 MB | 8 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SOCIA LABO, K.K.](https://appshunter.io/developer/1688326248) | [Lance Long](https://appshunter.io/developer/1895256259) |

## What reviewers say

### Müller

[App page](https://appshunter.io/ios/app/muller-lyer-illusion-app/id6450165949)

**Features:** macOS Compatibility

**In-app purchases:** none


### Graintouch Pro

[App page](https://appshunter.io/ios/app/graintouch-pro/id6782504327)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Müller free?

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

### Is Graintouch Pro free?

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

### Do Müller or Graintouch Pro have ads?

Müller shows ads; Graintouch Pro does not.

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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.*