# 帝國圖書館 vs SORARI

The clearest difference is in-app purchases: 帝國圖書館 at none against SORARI's 2. 帝國圖書館 also leads on ads (none vs shown). SORARI's advantage is update cadence (every 2 months vs every 7 months). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. SORARI sells 2 one-off in-app purchases. 帝國圖書館 asks for nothing beyond the download.

帝國圖書館 ships an update every 7 months, SORARI every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 帝國圖書館 | SORARI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (39 ratings)](https://appshunter.io/ios/app/sorari/id1207167864/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | **72.2% of reviews** | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 30 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Shin-ichi Nishimura](https://appshunter.io/developer/404706178) | [satoshi kumagai](https://appshunter.io/developer/1193484492) |

## What reviewers say

### 帝國圖書館

[App page](https://appshunter.io/ios/app/id963604056)

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

**In-app purchases:** none


### SORARI

[App page](https://appshunter.io/ios/app/sorari/id1207167864)

Access and read Japanese literature from Aozora Bunko. Customize font size, color, and layout for a comfortable reading experience. Discover new and popular books with daily updates and monthly rankings.

**Highlights:** Access Aozora Bunko library, Customizable font size and color, Adjustable margins and line spacing, Beautiful ruby and wordwrap layout, Daily book additions, Monthly popular book rankings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Front cover | $0.99 | one-time |
| DeleteAds | $1.99 | one-time |


## Frequently asked questions

### Is 帝國圖書館 free?

帝國圖書館 is free to download, with no in-app purchases.

### Is SORARI free?

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

### Do 帝國圖書館 or SORARI have ads?

SORARI shows ads; 帝國圖書館 does not.

### Which is updated more often, 帝國圖書館 or SORARI?

帝國圖書館 ships an update every 7 months, and SORARI every 2 months. Most recently, 帝國圖書館 was updated on October 24, 2026 and SORARI on October 29, 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.*