iBunkoS vs Tokko no Shima
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.
Tokko no Shima
Experience a gripping historical comic about human torpedo crews in the Pacific War. The first volume is free, with subsequent volumes available for purchase. Discover the acclaimed work by Syuho Sato, known for "Give My Regards to Black Jack."
- Historical Pacific War comic
- Human torpedo crew depiction
- First volume free
- Subsequent volumes for purchase
- Work by Syuho Sato
- Available on iPhone and iPad
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===================== Thank you for waiting! We added the latest 7th volume. ===================== The Pacific War, human torpedoes, the Battle of Okinawa... The comic, "Tokko no Shima," still under an admiration serialization, comes up as an iPhone / iPad app now! It is the elaborating work by Syuho Sato, who is famous with his works, "Give My Regards to Black Jack" and "Umizaru." It is still under an admiration serialization, "Tokko no Shima"!! ===================== You can enjoy the 1st volume for free! The 2nd volume or later will be offered for a fee. ===================== This work depicts the battle of crews of human torpedoes, "Kaiten," in the last years of the Pacific War. You can readily enjoy it in your iPhone / iPad. Please try it at this opportunity! The newest publication is also scheduled to be released after the publication! ===================== About "Tokko no Shima": ===================== It is the cartoon by Shuho Sato, which depicts the everyday life of Kaiten special attack unit in the last years of the Greater East Asia War. It has been irregularly serialized in Hobunsya "Weekly Manga TIMES “from 2004. The publishment was suspended from 2008, but has been resumed in 2010. ***************** The Title: Tokko no Shima The Author: Shuho Sato The Site: Manga on Web (http://mangaonweb.con) *****************
Screenshots
Verdict
The clearest difference is price: Tokko no Shima at Free against iBunkoS's $2.99. Tokko no Shima also leads on review sentiment (74% vs 51%). iBunkoS's advantage is in-app purchases (none vs 10) and chart position (#174 vs unranked). On ads, device support and iOS requirement 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
Tokko no Shima is free to download; iBunkoS costs $2.99 up front. Tokko no Shima sells 10 one-off in-app purchases. iBunkoS asks for nothing beyond the download.
iBunkoS ships an update every 2 months, Tokko no Shima every 5 months. Both last shipped on November 1, 2026.
| Parameter | iBunkoS | Tokko no Shima |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.4 (9 ratings) — better | — |
| Positive reviews | 51.2% of reviews | 73.9% of reviews — better |
| Number of ratings | 9 — better | — |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #174 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 35 MB | 5 MB |
| Age rating | 4+ | 12+ |
| Developer | DWANGO Co., Ltd. | Susumu Hoshikawa |
Customer experience
iBunkoS
Tokko no Shima
In-app purchases
iBunkoS
No in-app purchases
Tokko no Shima
- 特攻の島 第2巻$1.99
- 特攻の島 第3巻$1.99
- 特攻の島 第4巻$1.99
Show 7 moreShow fewer
- 特攻の島 第5巻$1.99
- 特攻の島 第6巻$1.99
- 特攻の島 第7巻$1.99
- 特攻の島 第8巻$1.99
- マンガ on ウェブ 20号$2.99
- マンガ on ウェブ 21号$2.99
- マンガ on ウェブ 22号$2.99









