Riffle - English Book Reader

Riffle - Your Smart English Reading Companion Riffle is a powerful tool designed to make reading English books more enjoyable and effective while helping you build your vocabulary naturally. Key Features * Smart Reading Experience Read EPUB and PDF books with a clean, customizable interface Adjustable font size, style, and themes including Dark Mode Smooth page navigation with progress tracking * Instant Translation & Learning Tap any word or phrase for instant translation Smart word form recognition (handles plurals, tenses, etc.) Save words directly to your vocabulary list View detailed word information from multiple online dictionaries * Vocabulary Management Build your personal vocabulary list while reading Review words in context with original sentences Track your learning progress Organize and manage your word collection * Scientific Recitation System Smart spaced repetition system for efficient learning Personalized review schedules Progress tracking for each word Context-based learning with original sentences * Interactive Listening Practice Listen to your vocabulary words with high-quality text-to-speech Customize playback sequences: Word pronunciation Letter-by-letter spelling Translation Context sentences Multiple playback ranges: All vocabulary words Current study list Words due for review * Sentence Collection Save useful sentences while reading Automatic translation Original context preservation Quick navigation back to source