# ShelfShare vs Book

The clearest difference is in-app purchases: ShelfShare at none against Book's 1. ShelfShare also leads on update cadence (every 2 months vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

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

ShelfShare ships an update every 2 months, Book every 6 months. The most recent releases landed on December 24, 2025 and September 8, 2026 respectively.

## The numbers

| Metric | ShelfShare | Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 14 MB | 60 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thierry MARKWITZ](https://appshunter.io/developer/1762279309) | [TATSUO NAKANO](https://appshunter.io/developer/1846200191) |

## What reviewers say

### ShelfShare

[App page](https://appshunter.io/ios/app/shelfshare/id6627340041)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 ShelfShare free?

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

### Is Book free?

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

### Do ShelfShare or Book have ads?

Both ShelfShare and Book show ads.

### Which is updated more often, ShelfShare or Book?

ShelfShare ships an update every 2 months, and Book every 6 months. Most recently, ShelfShare was updated on December 24, 2025 and Book on September 8, 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.*