RubiMask - PDF Ruby Eraser

【PDF to Text & Audio】All-in-One Japanese Book Digitizer!

Load vertical Japanese book PDFs/images → Auto-mask ruby (furigana) → OCR text extraction → Audio file export. Everything in ONE app!

PROBLEM SOLVED
"OCR scrambles my text because ruby mixes with main characters..."
"Scanned books have terrible text recognition accuracy..."
"I want to listen to my books as audio..."

RubiMask auto-detects and masks ruby text, enabling high-accuracy OCR. Plus, convert your text to audio files (M4A) for listening!

KEY FEATURES

【Auto Ruby Masking】
- Automatically detects text columns in vertical Japanese
- Calculates column spacing to mask only ruby areas
- Fully adjustable column width and pitch

【OCR Text Recognition】
- Specialized for vertical Japanese text
- Horizontal text also supported
- Edit recognized text directly in-app
- Real-time character change tracking

【Multiple Export Formats】
- Text file (.txt)
- Audio file (M4A) - Turn books into audiobooks!
- PNG images (ZIP compression available)
- Masked PDF output
- Save directly to Photos

【Convenience Features】
- Margin masking (remove page numbers, headers)
- Manual mask editing (drag & drop)
- Project save/load for pause & resume
- Pinch-to-zoom for precise adjustments

PERFECT FOR
- Digitizing paper books and rare editions
- Extracting text from novels and manga
- Preparing source text for translation
- Creating ruby-free versions for learners
- Converting books to audiobook format
- Creating accessible text for screen readers

PREMIUM FEATURES (one-time purchase)
- Remove all ads
- Unlimited pages (free: 100 pages)
- Unlimited project saves (free: 3 projects)
- PDF export
- Audio export (M4A)