# 読書管理CatBook vs Favorite

The clearest difference is in-app purchases: 読書管理CatBook at none against Favorite's 3. 読書管理CatBook also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.4). Favorite's advantage is update cadence (every 6 days vs monthly). On price and ads there is nothing between them.

Both are free to download. Favorite sells 3 in-app purchases, starting at $9.99 per 7 days. 読書管理CatBook asks for nothing beyond the download.

読書管理CatBook ships an update monthly, Favorite every 6 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 読書管理CatBook | Favorite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/favorite-learn-languages/id6692610041/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 82 MB | 119 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Sumie Watanabe](https://appshunter.io/developer/1349237972) | [Shinya Kinjo](https://appshunter.io/developer/1697811607) |

## What reviewers say

### 読書管理CatBook

[App page](https://appshunter.io/ios/app/catbook/id1565953416)

Track your reading progress, including title, author, and reading status. Organize books by series or magazine issues and get reminders for library book returns. Easily add books via ISBN scan.

**Highlights:** Record title, author, volume, notes, and reading progress, Organize books by series or magazine issues, Library mode with return date reminders, ISBN search with camera scanning, Save data to CSV, Calendar view for reading records

**Features:** macOS Compatibility

**In-app purchases:** none


### Favorite

[App page](https://appshunter.io/ios/app/favorite-learn-languages/id6692610041)

Transform your favorite YouTube videos into engaging language lessons. Practice listening with subtitles, get instant AI help with grammar and expressions, and study using content you genuinely enjoy.

**Highlights:** Subtitle-based listening practice, AI native speaker assistance, Add YouTube videos via URL, Multi-language support, Personalized learning content

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム（週間） | $9.99 | per 7 days |
| プレミアム（年間） | $89.99 | per year |
| プレミアム（年間） | $119.99 | per year |


## Frequently asked questions

### Is 読書管理CatBook free?

読書管理CatBook is free to download, with no in-app purchases.

### Is Favorite free?

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

### Do 読書管理CatBook or Favorite have ads?

Both 読書管理CatBook and Favorite show ads.

### Which is updated more often, 読書管理CatBook or Favorite?

読書管理CatBook ships an update monthly, and Favorite every 6 days. Most recently, 読書管理CatBook was updated on October 24, 2026 and Favorite 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.*