# Spatial Audio Preview vs AI Audiobook Reader

The clearest difference is in-app purchases: Spatial Audio Preview at none against AI Audiobook Reader's 2. Spatial Audio Preview also leads on iOS requirement (16.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. AI Audiobook Reader sells 2 in-app purchases, starting at $9.99 per month. Spatial Audio Preview asks for nothing beyond the download.

## The numbers

| Metric | Spatial Audio Preview | AI Audiobook Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 939 MB | 26 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Levi Thomas Gobin](https://appshunter.io/developer/1835016030) | [SlothEase](https://appshunter.io/developer/1816632091) |

## What reviewers say

### Spatial Audio Preview

[App page](https://appshunter.io/ios/app/spatial-audio-preview/id6761795541)

**Features:** macOS Compatibility

**In-app purchases:** none


### AI Audiobook Reader

[App page](https://appshunter.io/ios/app/ai-audiobook-reader-castly/id6768542554)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Castly Pro Monthly | $9.99 | per month |
| Castly Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is Spatial Audio Preview free?

Spatial Audio Preview is free to download, with no in-app purchases.

### Is AI Audiobook Reader free?

AI Audiobook Reader is free to download, with in-app purchases available.

### Do Spatial Audio Preview or AI Audiobook Reader have ads?

Neither Spatial Audio Preview nor AI Audiobook Reader 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.*