# 栞灯 vs Book Memo

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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

栞灯 ships an update every 2 months, Book Memo every 2 weeks. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 栞灯 | Book Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 12 MB | 36 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KOKORO AI LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1818743242) | [Yuki Tagami](https://appshunter.io/developer/6802937847) |

## What reviewers say

### 栞灯

[App page](https://appshunter.io/ios/app/id6799999846)

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

**In-app purchases:** none


### Book Memo

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 栞灯 free?

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

### Is Book Memo free?

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

### Do 栞灯 or Book Memo have ads?

栞灯 shows ads; Book Memo does not.

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

栞灯 ships an update every 2 months, and Book Memo every 2 weeks. Most recently, 栞灯 was updated on October 29, 2026 and Book Memo 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.*