# Pixel Wind Tunnel vs ViscousJoukowski

The clearest difference is device support: Pixel Wind Tunnel at 3 against ViscousJoukowski's 1. Pixel Wind Tunnel also leads on iOS requirement (13.0 vs 17.0). On price, ads 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.

## The numbers

| Metric | Pixel Wind Tunnel | ViscousJoukowski |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 16 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hiroki Kijima](https://appshunter.io/developer/1326808571) | [ManneTroll Solutions](https://appshunter.io/developer/313743954) |

## What reviewers say

### Pixel Wind Tunnel

[App page](https://appshunter.io/ios/app/pixel-wind-tunnel/id6760957754)

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

**In-app purchases:** none


### ViscousJoukowski

[App page](https://appshunter.io/ios/app/viscousjoukowski/id6806776003)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pixel Wind Tunnel free?

Pixel Wind Tunnel is free to download, with no in-app purchases.

### Is ViscousJoukowski free?

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

### Do Pixel Wind Tunnel or ViscousJoukowski have ads?

Neither Pixel Wind Tunnel nor ViscousJoukowski shows ads.

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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.*