# Book Memo vs Bookspine

The clearest difference is in-app purchases: Book Memo at none against Bookspine's 1. Bookspine's advantage is update cadence (every 3 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Book Memo ships an update every 2 weeks, Bookspine every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Book Memo | Bookspine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 36 MB | 2 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Tagami](https://appshunter.io/developer/6802937847) | [Minari Taniguchi](https://appshunter.io/developer/6796972156) |

## What reviewers say

### Book Memo

[App page](https://appshunter.io/ios/app/book-memo-reading-log-and-notes/id6810904258)

**Features:** Vision Pro support

**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 Book Memo free?

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

### Is Bookspine free?

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

### Do Book Memo or Bookspine have ads?

Neither Book Memo nor Bookspine shows ads.

### Which is updated more often, Book Memo or Bookspine?

Book Memo ships an update every 2 weeks, and Bookspine every 3 days. Most recently, Book Memo was updated on October 31, 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.*