# Book vs AudioPig

The clearest difference is in-app purchases: Book at none against AudioPig's 4. AudioPig's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. AudioPig sells 4 in-app purchases, starting at $3.99 per month. Book asks for nothing beyond the download.

## The numbers

| Metric | Book | AudioPig |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Monthly |
| Size | 1 MB | 79 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | — | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Maren Bellamy](https://appshunter.io/developer/1887168890) | [Nitay Abuzaglo](https://appshunter.io/developer/6782660905) |

## What reviewers say

### Book

[App page](https://appshunter.io/ios/app/book-train-your-knowledge/id6760989511)

**In-app purchases:** none


### AudioPig

[App page](https://appshunter.io/ios/app/audiopig/id6782660903)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AudioPig Plus | $3.99 | per month |
| Coffee Tip | $2.99 | one-time |
| Lunch Tip | $6.99 | one-time |
| Today's Rent Tip | $14.99 | one-time |


## Frequently asked questions

### Is Book free?

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

### Is AudioPig free?

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

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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.*