# Bookstacks vs Book Memo

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

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

Bookstacks ships an update daily, Book Memo every 2 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Bookstacks | Book Memo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 2 days |
| Size | 25 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kenta Takeuchi](https://appshunter.io/developer/1879746418) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### Bookstacks

[App page](https://appshunter.io/ios/app/bookstacks/id6760252143)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Bookstacks free?

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

### Is Book Memo free?

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

### Do Bookstacks or Book Memo have ads?

Both Bookstacks and Book Memo show ads.

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

Bookstacks ships an update daily, and Book Memo every 2 days. Most recently, Bookstacks was updated on November 9, 2026 and Book Memo on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*