# Book Memo vs 栞灯

The clearest difference is in-app purchases: 栞灯 at none against Book Memo's 1. 栞灯 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Book Memo's advantage is update cadence (every 2 days vs every 2 months). On price and ads there is nothing between them.

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

Book Memo ships an update every 2 days, 栞灯 every 2 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Book Memo | 栞灯 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 2 months |
| Size | 5 MB | 12 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [丽佳 施](https://appshunter.io/developer/1894580777) | [ココロAI合同会社](https://appshunter.io/developer/1818743242) |

## What reviewers say

### Book Memo

[App page](https://appshunter.io/ios/app/book-memo-reading-log/id6793607401)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### 栞灯

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Book Memo free?

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

### Is 栞灯 free?

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

### Do Book Memo or 栞灯 have ads?

Both Book Memo and 栞灯 show ads.

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

Book Memo ships an update every 2 days, and 栞灯 every 2 months. Most recently, Book Memo was updated on October 21, 2026 and 栞灯 on October 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.*