# RYURAKU vs ViscousJoukowski

The clearest difference is ads: ViscousJoukowski at none against RYURAKU's shown. RYURAKU's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). 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.

## The numbers

| Metric | RYURAKU | ViscousJoukowski |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Weekly | — |
| Size | 24 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) | [ManneTroll Solutions](https://appshunter.io/developer/313743954) |

## What reviewers say

### RYURAKU

[App page](https://appshunter.io/ios/app/ryuraku/id6760613893)

**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 RYURAKU free?

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

### Is ViscousJoukowski free?

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

### Do RYURAKU or ViscousJoukowski have ads?

RYURAKU shows ads; ViscousJoukowski 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.*