# Spinner Speed vs Chladni

The clearest difference is in-app purchases: Spinner Speed at none against Chladni's 1. Spinner Speed also leads on ads (none vs shown) and iOS requirement (10.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Chladni sells 1 one-off in-app purchase. Spinner Speed asks for nothing beyond the download.

## The numbers

| Metric | Spinner Speed | Chladni |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 10 days |
| Size | 54 MB | 5 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Wendler](https://appshunter.io/developer/601887985) | [Takashi Nemoto](https://appshunter.io/developer/6790828928) |

## What reviewers say

### Spinner Speed

[App page](https://appshunter.io/ios/app/spinner-speed/id1280854655)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chladni

[App page](https://appshunter.io/ios/app/chladni-sound-patterns/id6812944446)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads and Watermark | $0.99 | one-time |


## Frequently asked questions

### Is Spinner Speed free?

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

### Is Chladni free?

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

### Do Spinner Speed or Chladni have ads?

Chladni shows ads; Spinner Speed 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.*