Comparison

iBunkoS vs 帝国書院

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Currently charting
Read full description

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.

About

帝国書院

Features
Read full description

社会科の教科書・地図帳の出版社「帝国書院」がアプリを学校の先生方限定リリース! 先生方の日々のお授業に役立つ情報(オリジナル記事や研究会情報など)を発信予定です。従来、紙でお届けしていた定期冊子も、スマホでいつでも読んでいただけます。 【こんな先生にオススメ】 ・他の学校の実践例を知りたい。 ・手軽に地図帳を活用してみたい。 ・教育情報が気になるが、どこから入手すればよいかわからない。 ・時間がなく、スキマ時間にさっと情報を得たい。 【注意事項】 ・本サービスは、学校の先生方のみがご利用いただけます。 ・指導書Webサポートをはじめとする既存のWebコンテンツは、これまで通りWebサイト上でご利用ください。 ・アプリのログインには、Webサイトでの会員登録が必須です。既にご登録いただいている先生方は、そのアカウントでご利用いただけます。

Screenshots

iBunkoS4 screens
帝国書院4 screens

Verdict

The call

The clearest difference is price: 帝国書院 at Free against iBunkoS's $2.99. iBunkoS's advantage is chart position (#181 vs unranked). On update cadence, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

iBunkoS ships an update every 2 months, 帝国書院 every 6 weeks. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 9 level
iBunkoS versus 帝国書院: the parameters behind the verdict, then further details
ParameteriBunkoS帝国書院
Price$2.99Free — better
Rating4.4 (9 ratings) — better—
Positive reviews51.2% of reviews—
Number of ratings9 — better—
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#181 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better13.0
Further details — not scored
Size34 MB44 MB
Age rating4+4+
DeveloperDWANGO Co., Ltd.帝国書院

In-app purchases

None

iBunkoS

No in-app purchases

None

帝国書院

No in-app purchases

Questions

Is iBunkoS free?
iBunkoS costs $2.99, with no in-app purchases.
Is 帝国書院 free?
帝国書院 is free to download, with no in-app purchases.
Do iBunkoS or 帝国書院 have ads?
Neither iBunkoS nor 帝国書院 shows ads.
Which is updated more often, iBunkoS or 帝国書院?
iBunkoS ships an update every 2 months, and 帝国書院 every 6 weeks. Most recently, iBunkoS was updated on October 19, 2026 and 帝国書院 on October 8, 2026.

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