AI Forgets. Lanma Remembers.
ChatGPT can help you practice — but it forgets everything after each session. Lanma tracks every word you learn, schedules reviews through Study, Quiz, and AI Chat, and brings them back right when you're about to forget.
From YouTube to fluency in seconds
Four simple steps to turn any video into a personalized vocabulary lesson.
Paste any YouTube link
Copy a YouTube URL from any video — K-drama clips, anime episodes, news, tutorials, music videos. Lanma fetches the transcript automatically.
AI extracts vocabulary instantly
AI identifies key vocabulary words from the transcript with definitions, example sentences, and context from the video.
Practice with AI chat
Use your new vocabulary in realistic AI chats. Get grammar corrections and a detailed report card.
Lanma remembers
Words you struggled with come back automatically through spaced repetition. Your mistakes from AI chats feed directly into your next study session. Nothing is lost.
Everything you need to learn vocabulary
YouTube → Vocabulary
Paste any YouTube link and get an AI-generated vocabulary list with definitions, examples, and context. Also works with any website URL via Jina Reader.
Spaced Repetition (SM-2+)
Scientifically proven algorithm that schedules reviews at the optimal time for long-term retention. The same system trusted by medical students and polyglots worldwide.
AI Chat Practice
Practice your new vocabulary in natural chat with AI. Context-aware dialogue that uses the words you just learned. Choose scenarios like cafe ordering, job interviews, or hotel check-in.
Flashcard & Quiz
Classic study tools with a clean, modern interface. Flip through flashcards, take multiple-choice quizzes, or type answers from memory for the deepest recall.
Import from Anki
Already have Anki decks? Bring them to Lanma in seconds. Import .apkg, .colpkg, or .txt files and start learning with modern AI features on top of your existing cards.
Inside the algorithm
Lanma uses SM-2+, a refined version of the spaced repetition algorithm trusted by medical students and polyglots. Here's exactly how it decides when to show you each word.
Every word has a learning state
You grade each word honestly
After seeing the answer, you tap one of three buttons. Your choice tells the algorithm exactly how well you remembered.
Intervals grow as you remember
Each correct answer multiplies your review interval by a personal ease factor. The better you know a word, the longer before you see it again.
Six levels of mastery
Your review interval determines your mastery level. As intervals grow, you progress through six stages — from first encounter to fully mastered.
The result: you spend time on words you're about to forget, not words you already know. No manual scheduling, no guesswork — just science.
12 languages, any combination
Create word sets in any language pair. Learn English to Japanese, Spanish to Korean, or any combination you need.
The user interface is also available in all 12 languages.
Simple, transparent pricing
Start free and upgrade when you need more. All plans are ad-free.
Frequently asked questions
Start learning for free
No credit card required. No ads. Just vocabulary.
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