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App Store Apps > Utilities > RubiMask: Book Translator
RubiMask: Book Translator icon

RubiMask: Book Translator

2.00
KeiK LLC
5.00
2 reviews
Free

RubiMask: Book Translator Screenshot 1 of 5
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RubiMask: Book Translator Screenshot 5 of 5
Screenshots by KeiK LLC, from the the App Store listing
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AppBrain's verdict

Rating on App Store
5.00
2 ratings
Last updated
November 2, 2026
Size
27.3 MB

It doesn't have enough ratings yet to judge what users think.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on RubiMask: Book Translator for iOS

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Store listing

By KeiK LLC, from the App Store
Description by KeiK LLC Written by the developer, not by AppBrain. Click to read.
Read books in any language — in your own language.
Point your camera at a page, select a passage, and RubiMask translates it and reads it aloud. Tap any word to see what it means.

Japanese novels, Chinese web fiction, English paperbacks, manga, textbooks, printed handouts: if it's on a page, you can read it.

HOW IT WORKS
1. Scan a page with the camera, or open a photo or PDF
2. Drag over the passage you want to read
3. Listen to the translation — then tap words to learn them

KEY FEATURES

【Just Point Your Camera】
- Hold your camera over a page and keep still: the page is read and translated right on screen, no photo needed
- Reading Japanese? Hide furigana live with the camera, too

【Made for iPhone Duo】
- Half open: the page on top, the translation (or recognized text) below. Fully open: the page and its translation side by side
- Furigana-free pages open as a two-page spread, like a real book (right to left for vertical Japanese)
- The live camera shows the camera view and the translation together

【Translate Any Page】
- Detects the book's language automatically
- Translates on your device with Apple's translation engine
- Reads the translation aloud automatically, or plays the original for listening practice
- Books already in your language are read aloud without translating

【Tap a Word, Get the Meaning】
- Every word in the passage is tappable
- Shows the reading (hiragana for Japanese, pinyin for Chinese) and a quick translation
- Look words up in the built-in iOS dictionary
- On devices with Apple Intelligence, see what the word means in this exact sentence

【Made for Real Books】
- Built-in document scanner straightens and crops pages
- Pinch to zoom in on small print, then select precisely
- Vertical Japanese text supported, with furigana (ruby) ignored so it doesn't scramble the text
- Save your book and pick up where you left off

【Furigana Masking & OCR Tools】
- Automatically mask furigana on vertical Japanese books
- Extract text from PDFs and photos in many languages
- Export as text, masked PDF, images, or audio (M4A)

PERFECT FOR
- Reading books in a language you're learning
- Enjoying Japanese novels and manga before they're translated
- Understanding textbooks, handouts, and printed documents
- Listening to a page instead of reading it

FREE & PREMIUM
Free: 20 reads per day, and word meanings are always free.
Premium:
- Unlimited reading
- Remove all ads
- Unlimited pages (free: 100 pages)
- Unlimited project saves (free: 3 projects)
- PDF export
- Audio export (M4A)

Automatic translation requires iOS 18 or later. "In this sentence" meanings require a device with Apple Intelligence.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://keik.co.jp/rubimask/privacy-en.html

Safety and technology

Found in the app by AppBrain
Price
Free
App size
27.3 MB
Content rating
Everyone

Technologies used by RubiMask: Book Translator

Releases

Updates seen on the App Store
Version
2.00
Launched
December 2025

No changelog data

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About the app and developer

About RubiMask: Book Translator

RubiMask: Book Translator is an utilities app developed by KeiK LLC.

User Ratings

RubiMask: Book Translator is rated 5.00 out of 5 stars. The rating is based on 2 ratings.

App Information

RubiMask: Book Translator is freely available from the App Store. The app size is 27.31 MB. The latest version available is 2.00. The last update was on November 2, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since December 2025.

RubiMask: Book Translator is made and published by KeiK LLC. AppBrain is an independent app data site and isn't affiliated with KeiK LLC. The app name, icon, screenshots and description belong to KeiK LLC and are shown as published on the App Store.

Developer information for KeiK LLC

KeiK LLC

Address:

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