# ViscousJoukowski vs WindFlow

The clearest difference is in-app purchases: ViscousJoukowski at none against WindFlow's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WindFlow sells 2 in-app purchases, starting at $4.99 per month. ViscousJoukowski asks for nothing beyond the download.

## The numbers

| Metric | ViscousJoukowski | WindFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 16 MB | 39 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ManneTroll Solutions](https://appshunter.io/developer/313743954) | [Kick-Start AI](https://appshunter.io/developer/1852387402) |

## What reviewers say

### ViscousJoukowski

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

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

**In-app purchases:** none


### WindFlow

[App page](https://appshunter.io/ios/app/windflow-3d-print-aero/id6814596000)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WindFlow Monthly | $4.99 | per month |
| WindFlow Yearly | $34.99 | per year |


## Frequently asked questions

### Is ViscousJoukowski free?

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

### Is WindFlow free?

WindFlow is free to download, with in-app purchases available.

### Do ViscousJoukowski or WindFlow have ads?

Neither ViscousJoukowski nor WindFlow 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.*