# 私は積読家 vs shelff

The clearest difference is price: 私は積読家 at Free against shelff's $6.99. 私は積読家 also leads on update cadence (daily vs every 4 days). shelff's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment, device support and iOS requirement there is nothing between them.

私は積読家 is free to download; shelff costs $6.99 up front. 私は積読家 sells 1 one-off in-app purchase. shelff asks for nothing beyond the download.

私は積読家 ships an update daily, shelff every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | 私は積読家 | shelff |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Positive reviews | 97.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 4 days |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#94** |
| Size | 178 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Rhipidon Society](https://appshunter.io/developer/1869191854) | [Satoshi Kojima](https://appshunter.io/developer/1887157382) |

## What reviewers say

### 私は積読家

[App page](https://appshunter.io/ios/app/id6758698105)

This app helps you manage your unread books, turning them into a source of pride rather than guilt. Track reading progress, rate finished books, and discover new reads. It offers multiple ways to add books and import data from other services.

**Highlights:** Manage unread, reading, and wishlist books, Track reading progress and rate finished books, Multiple book registration methods (barcode, search, manual), Import data from other book services, Generate shareable reading statistics and visuals, AI-powered book recommendations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PROプラン（広告非表示・機能制限解除） | $5.99 | one-time |


### shelff

[App page](https://appshunter.io/ios/app/shelff-pdf-book-reader/id6760986626)

**Currently charting:** #94 Top Paid · Book (US App Store)

Manage and read your PDF books with this app. Organize your library, customize your reading experience, and access your books through iCloud. It offers advanced PDF features and seamless integration with Siri and Shortcuts.

**Highlights:** Organize books with folders, tags, and collections, Full-text search across PDFs, Customizable PDF reader with margin cropping, Metadata editing and auto-extraction, Siri and Shortcuts integration, Data stored in iCloud Documents

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

**In-app purchases:** none


## Frequently asked questions

### Is 私は積読家 free?

私は積読家 is free to download, with in-app purchases available.

### Is shelff free?

shelff costs $6.99, with no in-app purchases.

### Do 私は積読家 or shelff have ads?

私は積読家 shows ads; shelff does not.

### Which is updated more often, 私は積読家 or shelff?

私は積読家 ships an update daily, and shelff every 4 days. Most recently, 私は積読家 was updated on October 31, 2026 and shelff 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.*