# 蓄積読書 vs StackBooks

The clearest difference is in-app purchases: StackBooks at none against 蓄積読書's 7. StackBooks also leads on update cadence (daily vs weekly) and iOS requirement (16.4 vs 26.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. 蓄積読書 sells 7 in-app purchases, starting at $2.99 per month. StackBooks asks for nothing beyond the download.

蓄積読書 ships an update weekly, StackBooks daily. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 蓄積読書 | StackBooks |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 129 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Yamagishi](https://appshunter.io/developer/1516430576) | [Kenta Nobutani](https://appshunter.io/developer/1840736944) |

## What reviewers say

### 蓄積読書

[App page](https://appshunter.io/ios/app/id1673784747)

This app helps adults build a reading habit by tracking progress, estimating completion times, and offering features to maintain reading streaks. It supports all book formats and allows for note-taking to capture insights.

**Highlights:** Real-time estimated reading completion time, Supports paper, e-books, and audiobooks, Streak maintenance with freeze items, Live Activity for lock screen progress, Note-taking for reading insights, Keyword search and barcode scanning for book registration

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 蓄積読書Plus＋ 月額プラン | $2.99 | per month |
| 蓄積読書Plus＋ 年額プラン | $22.99 | per year |
| 連続フリーズ | $0.29 | one-time |
| 連続フリーズ 2個 | $0.49 | one-time |
| 連続フリーズ 4個 | $0.99 | one-time |
| 連続フリーズ 3個 | $0.99 | one-time |
| 連続フリーズ 5個 | $1.99 | one-time |


### StackBooks

[App page](https://appshunter.io/ios/app/stackbooks-book-tracker-and-tbr/id6805723809)

Easily log books by scanning their ISBN or searching by title. Visualize your reading progress as a growing stack and organize your library with custom statuses, ratings, and notes. Track your reading habits and statistics offline.

**Highlights:** ISBN barcode scanning for quick book entry, Visual representation of reading progress as a book stack, Organize books with Wishlist, TBR, Reading, Read, and Paused statuses, Add star ratings, finish dates, and personal notes to finished books, Track reading statistics by author or tag, Offline functionality with on-device data storage, Export and import data for device changes

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

**In-app purchases:** none


## Frequently asked questions

### Is 蓄積読書 free?

蓄積読書 is free to download, with in-app purchases available.

### Is StackBooks free?

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

### Do 蓄積読書 or StackBooks have ads?

Neither 蓄積読書 nor StackBooks shows ads.

### Which is updated more often, 蓄積読書 or StackBooks?

蓄積読書 ships an update weekly, and StackBooks daily. Most recently, 蓄積読書 was updated on November 3, 2026 and StackBooks on November 6, 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.*