Ghost Card
Select any word and summon a beautiful floating definition card — pronunciation, etymology, examples, and part of speech, all in one elegant overlay. The Ghost Card appears right where you're reading, so you never lose context.
- AI-powered contextual definitions
- IPA phonetic pronunciation
- Real-world example sentences
- One-click save to wallet
Side Panel
A full immersive learning workspace that slides in from the side — review flashcards, read AI-generated stories built from your words, and track your progress without leaving the current page.
- AI-generated contextual stories
- Flashcard review sessions
- Learning progress tracker
- Integrated vocabulary browser
Vocabulary Wallet
Every word you learn is stored in a personal wallet — searchable, sortable, and organized by mastery level. Watch your collection grow over time as you read more and discover new words.
- Search and filter by mastery
- Sort by date, alphabetical, or difficulty
- Export your word collection
- Visual mastery indicators
Spaced Repetition
Powered by the SM-2 algorithm — the same science behind the most effective memory systems. Stemmy knows exactly when to review each word for maximum retention, so you never forget what you've learned.
- SM-2 algorithm scheduling
- Adaptive review intervals
- Difficulty-based prioritization
- Long-term retention optimization
Ready to Learn
Smarter?
Install Stemmy and transform every webpage into a learning opportunity. Free forever.
No sign-up required · Works on all websites · Open source