# Clay Read vs Book

The clearest difference is ads: Clay Read at none against Book's shown. Clay Read also leads on update cadence (every 2 weeks vs every 6 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Clay Read sells 2 in-app purchases, starting at $9.99 per month and Book sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Clay Read ships an update every 2 weeks, Book every 6 months. The most recent releases landed on October 1, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Clay Read | Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Size | 158 MB | 60 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [熙杰 尹](https://appshunter.io/developer/1556976877) | [TATSUO NAKANO](https://appshunter.io/developer/1846200191) |

## What reviewers say

### Clay Read

[App page](https://appshunter.io/ios/app/clay-read/id6747111179)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro monthly | $9.99 | per month |
| Pro Yearly | $99.99 | per year |


### Book

[App page](https://appshunter.io/ios/app/book-lifecycle-manager/id6757215528)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


## Frequently asked questions

### Is Clay Read free?

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

### Is Book free?

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

### Do Clay Read or Book have ads?

Book shows ads; Clay Read does not.

### Which is updated more often, Clay Read or Book?

Clay Read ships an update every 2 weeks, and Book every 6 months. Most recently, Clay Read was updated on October 1, 2026 and Book on September 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.*