Biro Reader: Learn Languages

Biro Reader is a modern, elegant bilingual eBook reader built for language learners and avid readers who want to enjoy authentic literature in foreign languages without breaking immersion. Using the proven parallel reading technique (Comprehensible Input), Biro Reader pairs the original text line-by-line with instant translations. Read famous classics in English, French, Spanish, Italian, German, Japanese, Chinese, or Russian with full confidence. Key Features: INTERLINEAR PARALLEL READING • Enjoy full EPUB and PDF books with line-by-line bilingual translation. • Tap-to-Reveal mode: Read the original sentence cleanly, and tap whenever you need a quick translation hint. • Continuous view mode: Show all translations simultaneously for effortless reading. IMPORT EPUB & PDF LIBRARIES • Easily import your DRM-free EPUB or PDF books from the Files app. • Intelligent automatic chapter and sentence tokenization. • Automatic source language detection. VOCABULARY & FLASHCARDS • Tap any word while reading to look up its exact context meaning. • Save unfamiliar words directly to your personal vocabulary library. • Practice with interactive 3D flip flashcards and track your mastery level (New, Learning, Mastered). BEAUTIFUL READING EXPERIENCE • Native Dark Mode, Pure OLED pitch black, Sepia, and Light color themes. • Customizable typography (Serif, Sans-Serif, Monospaced) and font size. • Chapter bookmarks and progress tracking across all your devices. TOTAL PRIVACY & OFFLINE READING • All your books, reading progress, and saved vocabulary stay securely on your device. • 100% offline reading support — read anywhere, on flights or off the grid. Start reading real books in the language you are learning today with Biro Reader!