# BookShelfGPT vs Bookspine

The clearest difference is in-app purchases: BookShelfGPT at none against Bookspine's 1. Bookspine's advantage is ads (none vs shown) and update cadence (every 3 days vs every 9 days). On price, device support and iOS requirement there is nothing between them.

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

BookShelfGPT ships an update every 9 days, Bookspine every 3 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BookShelfGPT | Bookspine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 3 days** |
| Size | 17 MB | 2 MB |
| Requires iOS | 17.4 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Cole](https://appshunter.io/developer/1758531959) | [Minari Taniguchi](https://appshunter.io/developer/6796972156) |

## What reviewers say

### BookShelfGPT

[App page](https://appshunter.io/ios/app/bookshelfgpt/id6560117972)

**In-app purchases:** none


### Bookspine

[App page](https://appshunter.io/ios/app/bookspine-reading-widget/id6815020170)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bookspine Pro | $7.99 | one-time |


## Frequently asked questions

### Is BookShelfGPT free?

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

### Is Bookspine free?

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

### Do BookShelfGPT or Bookspine have ads?

BookShelfGPT shows ads; Bookspine does not.

### Which is updated more often, BookShelfGPT or Bookspine?

BookShelfGPT ships an update every 9 days, and Bookspine every 3 days. Most recently, BookShelfGPT was updated on October 25, 2026 and Bookspine on October 31, 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.*