Passive language learning
Learn a language while you chat
Murmur annotates your AI conversations with personalized vocabulary and grammar. No flashcards, no courses — just learning that happens while you work.
How it works
Three steps to fluency
01
Install the extension
Add Murmur to Chrome in one click. Pick your target language and current level.
02
Chat with AI normally
Use ChatGPT or Claude as you always do. Murmur watches quietly in the background.
03
Learn from annotations
Personalized vocabulary and grammar appear inline — spaced to match your memory.
Features
Built around how memory actually works
Spaced repetition
Half-life regression tracks each word individually. You see it right when you're about to forget.
8 languages
Spanish, French, German, Italian, Portuguese, Ukrainian, Japanese, and Chinese.
Audio pronunciation
Hear every word spoken by a native voice. Tap any annotation to listen.
ChatGPT & Claude
Works inside the AI tools you already use every day. No new apps to learn.
Adaptive difficulty
Murmur learns what you know. Mastered words fade away. New ones take their place.
Start free, grow fluent
10 annotations per day, completely free. Need more?
$5/mo for unlimited
View Pricing