# N4 読解問題集 vs my books library

The clearest difference is price: my books library at Free against N4 読解問題集's $9.99. my books library also leads on update cadence (every 5 days vs every 21 months). N4 読解問題集's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

my books library is free to download; N4 読解問題集 costs $9.99 up front. my books library sells 3 in-app purchases, starting at $1.99 per month. N4 読解問題集 asks for nothing beyond the download.

N4 読解問題集 ships an update every 21 months, my books library every 5 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | N4 読解問題集 | my books library |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[4.3 (21 ratings)](https://appshunter.io/ios/app/my-books-library/id1022365605/reviews)** |
| Number of ratings | — | **21** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 2 MB | 62 MB |
| Requires iOS | 17.2 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yamase & Touwa Japanese Insititute](https://appshunter.io/developer/442115304) | [Andrea Schmerber](https://appshunter.io/developer/994123484) |

## What reviewers say

### N4 読解問題集

[App page](https://appshunter.io/ios/app/n4/id654088367)

**Features:** Vision Pro support

**In-app purchases:** none


### my books library

[App page](https://appshunter.io/ios/app/my-books-library/id1022365605)

Organize your personal book collection by scanning ISBNs or entering details manually. Access global book data, add personal ratings and notes, and track storage locations. Export your library in various formats and back up to iCloud.

**Highlights:** Scan ISBN or manual entry, Global book data catalog, Personal ratings and notes, Storage location tracking, Sort by author, title, rating, Export to CSV, PDF, iCloud backup

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $1.99 | per month |
| Premium yearly | $17.99 | per year |
| Premium full version | $49.99 | one-time |


## Frequently asked questions

### Is N4 読解問題集 free?

N4 読解問題集 costs $9.99, with no in-app purchases.

### Is my books library free?

my books library is free to download, with in-app purchases available.

### Do N4 読解問題集 or my books library have ads?

Neither N4 読解問題集 nor my books library shows ads.

### Which is updated more often, N4 読解問題集 or my books library?

N4 読解問題集 ships an update every 21 months, and my books library every 5 days. Most recently, N4 読解問題集 was updated on November 1, 2026 and my books library 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.*