Stemmy transforms your everyday browsing into an immersive vocabulary laboratory. No context-switching. No flashcard apps. Just learn as you read.
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.
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.
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.
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.
Install Stemmy and transform every webpage into a learning opportunity. Free forever.
No sign-up required · Works on all websites · Open source