# Dot vs Chladni

The clearest difference is in-app purchases: Dot at none against Chladni's 1. Dot also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Dot | Chladni |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Size | 35 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EOIN J TOLSTER](https://appshunter.io/developer/1867338583) | [Takashi Nemoto](https://appshunter.io/developer/6790828928) |

## What reviewers say

### Dot

[App page](https://appshunter.io/ios/app/dot-physics/id6777981105)

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

**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 |
| --- | --- | --- |
| Watermark-free Wallpapers | $0.99 | one-time |


## Frequently asked questions

### Is Dot free?

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

### Is Chladni free?

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

### Do Dot or Chladni have ads?

Neither Dot nor Chladni 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.*