iBunkoS vs Namo eBook Reader
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.
Namo eBook Reader
This application offers a robust and accurate way to view EPUB2 and EPUB3 ebooks. It supports various layout types, advanced styling, and provides a suite of user-friendly reading tools for a customizable experience.
- EPUB2 and EPUB3 support
- Reflowable and fixed-layout ebooks
- HTML5, Javascript, CSS3 rendering
- Table of contents, bookmarks, memos
- Customizable themes and fonts
- Text search and zoom
- File sharing import
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Namo Reader supports both EPUB2 and EPUB3. It is easy to use and intuitive, and expresses e-books fast and accurately. 1. Complies with the IDPF EPUB standard. - Supports both reflowable and fixed-layout e-books. - Expresses HTML5, Javascript, and CSS3 completely. - Check out Namo Reader for e-books (reflowable vertical writing e-books, fixed-layout e-books) that are not properly represented by other readers. 2. Provides a variety of user-friendly features. - Table of contents, bookmarks, memos, highlights - Changing themes and fonts, adjusting font size and line height, and controlling brightness - Screen rotation lock - Text search - Zooming in and out - User library settings - A shortcut and a collection of recently read books - Collection functions based on reading situation - Adding e-books by file sharing feature such as AirDrop, open in, iTunes 3. Provides perfect contents security by viewing without decompressing e-books, and enables efficient use of device storage space.
Screenshots
Verdict
The clearest difference is price: Namo eBook Reader at Free against iBunkoS's $2.99. Namo eBook Reader also leads on iOS requirement (12.0 vs 15.0). iBunkoS's advantage is rating (4.4 vs 2.0) and review sentiment (51% vs 38%). 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
Namo eBook Reader is free to download; iBunkoS costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iBunkoS holds the better App Store score, 4.4 against 2.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews point the same way: 51% of iBunkoS's written reviews are positive against 38% of Namo eBook Reader's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.
| Parameter | iBunkoS | Namo eBook Reader |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.4 (9 ratings) — better | 2.0 (2 ratings) |
| Positive reviews | 51.2% of reviews — better | 37.5% of reviews |
| Number of ratings | 9 — better | 2 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #178 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 35 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | DWANGO Co., Ltd. | ARASOFT.Co.,Ltd |
Customer experience
iBunkoS
Namo eBook Reader
In-app purchases
iBunkoS
No in-app purchases
Namo eBook Reader
No in-app purchases









