iBunkoS vs 青空本棚
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iBunkoS
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.
- 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
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iBunkoS provides you the best way to read novels, documents and comic books on iPhone. Thanks to a realistic interface, you can enjoy reading as you would with a real paper book. Reading on your iPhone is now easier than ever! This is a great iPhone app for all the book lovers! Read books and comics in vertical setting with comfort ・Support both horizontal (left open) and vertical (right open) writings. ・The app automatically detects the binding direction of a PDF document. Double page spread and page effect ・When viewed landscape mode, the pages switch to the double page spread. The pages containing landscape format images are automatically treated as a double page spread. ・You can "flip" pages just like reading a real paper book. Feature about 230 built-in books and "Aozora Bunko" ・ You can download a book with simple controls from "Aozora Bunko", the Japanese digital library that provides copyright-free Japanese literary works. ・ The app comes with the well-known books from "Aozora Bunko". "Bookshelf" function ・Create a bookshelf as you need. ・You can easily choose a book you'd like to read by browsing the book covers displayed on the shelf. "Bookmark" function ・You can place as many bookmarks as you want and add notes on it. ・Select text as a bookmark in order to highlight the sentence. Supported file formats. iBunkoS supports the following file formats as books: - .txt, .pdf - .zip, .rar (containing .txt or .jpg/.png files) - .cbz, .cbr Transfer files ・Transfer the files using iTunes 'File Sharing' via the USB cable as well as via Dropbox, SkyDrive, pogoplug, Box, SugarSync. The app also supports both the WebDAV and the FTP servers. Utilize data from PDF ・Support the table of contents or hyperlinks on the file. ・Select and search words (when the data contains text). ・Using our own processing technology, app can select a Japanese words smoothly. Smart screen design removing the white space ・Eliminate unnecessary white space for better readability on the screen. Thumbnails of pages show quick reference for where you'd like to read ・List the page thumbnails at the bottom of the screen or in the full screen. ・The page with bookmarks will be attached a mark. You can also display only the page thumbnails which contain bookmarks. History back pages ・Viewed pages are saved in history so you can easily go back to the previous page. Look up words in the dictionary ・You can use the iPhone's built-in dictionary as well as other dictionary apps that support custom URL schemes. ・Just select text and tap the button to look up the word. Passcode lock ・You can set passcode lock on specific bookshelves or the "folder" screen that stored transferred files. Various page settings ・Available various settings such as enable/disable the flipping effect or change the position of the tap control. ・Customize your iBunkoS to suit your own preferences! You will find many more convenient functions and settings.
青空本棚
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.
- 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
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青空文庫の作品をダウンロードして快適に読める電子書籍ビューアです。シンプルで使いやすく、カスタマイズ機能も充実。お気に入りの名作を自分好みの設定でお楽しみください。 【主な機能】 音声読み上げ機能:朗読を聞きながら読書可能 スワイプでページめくり:直感的な操作で快適な読書 しおり登録:読みかけのページを簡単保存 目次表示機能:目的の章へすぐアクセス フォントサイズ変更:文字を見やすく調整 フォントファミリー変更:お好みの書体で読書 背景色変更(白・セピア・ブラック):目に優しい表示に切り替え 青空文庫からダウンロード:無料で名作を入手
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iBunkoS | 青空本棚 |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.4 (9 ratings) — better | 4.3 (6 ratings) |
| Positive reviews | 51.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 9 — better | 6 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Best chart rank | #89 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 35 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Dwango Co., Ltd. | SHINA NAKAMURA |
Customer experience
iBunkoS
青空本棚
In-app purchases
iBunkoS
No in-app purchases
青空本棚
No in-app purchases








