# Espiro vs Chladni

The clearest difference is in-app purchases: Espiro at none against Chladni's 1. Espiro also leads on ads (none vs shown) and device support (3 vs 1). Chladni's advantage is update cadence (every 10 days vs monthly). On price there is nothing between them.

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

Espiro ships an update monthly, Chladni every 10 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Espiro | Chladni |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (8 ratings)](https://appshunter.io/ios/app/espiro/id1279184456/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free | — |
| Size | 123 MB | 5 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [The Orbit Company for Software Development](https://appshunter.io/developer/1274422532) | [Takashi Nemoto](https://appshunter.io/developer/6790828928) |

## What reviewers say

### Espiro

[App page](https://appshunter.io/ios/app/espiro/id1279184456)

Create unique roulette art with this drawing application. It offers an unbounded canvas, smooth animations, and a variety of wheel options to design intricate patterns. Save and share your creations easily with friends or browse an in-app gallery for inspiration.

**Highlights:** Unbounded canvas with custom background color, Smooth wheel animation for curve generation, Combine multiple wheel types and sizes, Over 150 wheel variations, Control line color, width, and opacity, Save and share drawings, In-app user gallery

**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 Espiro free?

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

### Is Chladni free?

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

### Do Espiro or Chladni have ads?

Chladni shows ads; Espiro does not.

### Which is updated more often, Espiro or Chladni?

Espiro ships an update monthly, and Chladni every 10 days. Most recently, Espiro was updated on October 23, 2026 and Chladni on October 24, 2026.

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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.*