# iBunkoS vs 青空本棚

The clearest difference is price: 青空本棚 at Free against iBunkoS's $2.99. 青空本棚 also leads on update cadence (weekly vs every 2 months). iBunkoS's advantage is ads (none vs shown) and chart position (#89 vs unranked). On rating, review sentiment, ratings volume and in-app purchases there is nothing between them.

青空本棚 is free to download; iBunkoS costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.4 for iBunkoS against 4.3 for 青空本棚. Both are backed by a comparable volume of ratings — 9 and 6 respectively. Written reviews are what separate them: 51% of iBunkoS's written reviews are positive against 50% of 青空本棚's.

iBunkoS ships an update every 2 months, 青空本棚 weekly. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | iBunkoS | 青空本棚 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/ibunkos/id418102178/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/id1621982150/reviews) |
| Number of ratings | **9** | 6 |
| Positive reviews | **51.2% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#89** | — |
| Size | 35 MB | 14 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dwango Co., Ltd.](https://appshunter.io/developer/297539595) | [SHINA NAKAMURA](https://appshunter.io/developer/669183266) |

## What reviewers say

### iBunkoS

[App page](https://appshunter.io/ios/app/ibunkos/id418102178)

**Currently charting:** #89 Top Paid · Book (US App Store)

This app offers a realistic paper book reading experience on your iPhone, supporting various file formats like TXT, PDF, and comics. It includes features like a digital bookshelf, bookmarking with notes, and dictionary lookups.

**Highlights:** Realistic paper book interface, Supports TXT, PDF, CBZ, CBR files, 230+ built-in books and Aozora Bunko access, Customizable bookshelf and bookmarks, File transfer via USB, cloud, and servers, Dictionary lookup integration, Passcode lock for privacy

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

**In-app purchases:** none


### 青空本棚

[App page](https://appshunter.io/ios/app/id1621982150)

This e-book viewer allows you to download and read works from Aozora Bunko comfortably. It offers a simple, user-friendly interface with extensive customization options for a personalized reading experience.

**Highlights:** Download Aozora Bunko books, Text-to-speech audio reading, Swipe page turning, Bookmark functionality, Table of contents access, Adjustable font size and family, Customizable background colors

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

**In-app purchases:** none


## Frequently asked questions

### Is iBunkoS free?

iBunkoS costs $2.99, with no in-app purchases.

### Is 青空本棚 free?

青空本棚 is free to download, with no in-app purchases.

### Which has better reviews, iBunkoS or 青空本棚?

iBunkoS is rated higher. iBunkoS averages 4.4 out of 5 from 9 ratings, while 青空本棚 averages 4.3 from 6 ratings.

### Do iBunkoS or 青空本棚 have ads?

青空本棚 shows ads; iBunkoS does not.

### Which is updated more often, iBunkoS or 青空本棚?

iBunkoS ships an update every 2 months, and 青空本棚 weekly. Most recently, iBunkoS was updated on November 10, 2026 and 青空本棚 on November 7, 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.*