📊 29K iOS Apps Tracked Updated 4 min ago ⚡ Revenue Forecasts
Create Account 🔑 Sign In
Home ⚡ Optimize
49
BU Score
Emerging

iBunkoS

4.4 ✍️ Editor
✍️ BU Analytics Review

iBunkoS is an iOS app from DWANGO Co., Ltd. in the Food & Drink category, currently rated 4.4★ across 9 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Our BU Score puts it at 49Emerging (early traction worth watching). For a Food & Drink app, that means early traction worth watching.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

Loading…
idle
0%
Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
0
since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Mature app (15y old)METRIC
+$1,500
Good rating (4.4★)METRIC
+$800
Pre-traction phase (9 ratings)METRIC
−$300
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 34 MB🔞 4+📱 iOS 12.0+🔖 v3.4.42🔄 updated 4mo ago🌐 EN, JA, ZH📂 Food & Drink💰 Paid🚀 Launched 2011 (15y old)

📝 About this app

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.

🆕 What's New · v3.4.42

- minor bug fixes

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
iBunkoS
Developer
DWANGO Co., Ltd.
Bundle ID
com.nagisa.ibunkos
App Store URL
Open in App Store
Category
Food & Drink
Content rating
4+
Languages
EN, JA, ZH

Company

Website
ibunko.jp
Tagline
i文庫|dwango
Description
i文庫なら、多くの文学作品など無料でインターネット上に公開している電子ライブラリ「青空文庫」の書籍コンテンツが手軽に読める!
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
OG image

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$201/mo
Top-grossing rank
Outside top 100 in US Food & Drink
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
Not found
Press / News
Not found

Contacts & Socials

Socials
Not found
Email
Not found
Phone
Not found
Contact page
http://ibunko.jp/support.html
About page
Not found
📈Ratings growth9 ratings+800% lifetimeShow 3-year history estimate ▾Apr 2011Jul 2024May 2026
Tracked (13 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

More Food & Drink