Every book you read becomes knowledge you keep.
Track vocabulary, save passages, and master your reading with spaced repetition and AI. Turn fleeting encounters with words into lasting understanding.
How it works
Three steps to a sharper mind.
Read
Open any book. When a word or passage strikes you, save it.
Capture
Add words with definitions, quotes with context. AI helps fill in the rest.
Master
Spaced repetition, games, and flashcards turn captures into lasting knowledge.
Features
Tools that respect the reader.
Not another flashcard app. A complete reading companion that grows with you.
Word Vault
Every word you encounter becomes a permanent entry in your personal dictionary. Definitions, pronunciation, usage examples, mastery tracking.
Quotes & Passages
Save the lines that move you. Organize into collections, rediscover them daily.
AI Assistant
Ask about any word. Get definitions, etymology, usage in context, and quiz yourself.
Book Tracking
Track your reading list. Connect every word and quote back to its source.
Learning Games
Flashcards, crosswords, word scrambles, and match games for retention that sticks.
Reading Clubs
Share discoveries, discuss books, and grow your vocabulary with fellow readers.
Built for momentum
Reading is better when growth is visible.
BookBrain turns the invisible work of reading into measurable progress. Streaks keep you consistent. XP makes mastery tangible. Achievements celebrate the milestones others never see.
- Spaced repetition that adapts to your pace
- Daily streaks and weekly progress tracking
- Achievement badges for vocabulary milestones
- XP system that rewards consistent learning
Century Scholar
100 words mastered
Your next book is waiting.
Start capturing words and quotes today. Free, private, and built to grow with you.