Flashcards that write themselves — from your life
Every word you meet in conversation, every mistake you make, every caption you save becomes a card. Your wordbook grows out of your actual learning, not someone else’s list.
Free to start. No credit card required.
“Learn from my own interests?
Game-changing.”
The problem with everyone else’s flashcards
Downloaded decks are full of words you’ll never use, in an order that has nothing to do with your life. And hand-making cards is such a chore that most people abandon it within a month. The best flashcard is one made from a word you personally needed and didn’t have — at the moment you needed it.
That’s exactly what Björn builds. Highlight any word or phrase in a conversation to translate it, look up its forms and tenses, and save it. Words from your mistakes, your questions and your saved YouTube captions flow into your wordbook automatically.
Dynamic practice, not flip-and-guess
Björn’s flashcards aren’t static two-sided cards. Practice questions are generated dynamically around each word — different angles, different contexts, real sentences — so you learn to use the word, not just recognise the card.
Because the words came from your own conversations, every review reinforces something you have a genuine memory of encountering. That context is what makes vocabulary stick.
From wordbook back into conversation
Vocabulary isn’t finished when you remember the card — it’s finished when you use the word without thinking. Björn closes the loop: words you’re learning resurface naturally in your conversations, and your progress is tracked along CEFR levels so you can watch your active vocabulary grow.
Free users get the full flashcard system for one language; premium unlocks unlimited languages with multi-device sync.
Zero-effort card creation
Highlight, translate, save — from conversations or YouTube captions. No deck-building homework, ever.
Cards with real context
Every word comes from somewhere in your learning, so every review connects to a genuine memory.
Dynamically generated questions
Fresh practice questions around each word — not the same two card faces until your eyes glaze over.
Full forms and tenses
Look up conjugations, plurals and grammar for any saved word, right where you saved it.
Features you
will love
Real-world
conversations
Have flowing, natural conversations
with the world's highest quality voices
Highlight,
translate, save
For any word or phrase - translate, save,
and lookup forms and tenses
10+ languages
supported
More added on request.
What do you want to learn?
Review and track
daily progress
Gain insights for each session and track
progress over time (~CEFR grading)
Next-gen wordbook
& flashcards
Dynamically generated
from your own interests
Everything you need to
succeed in one platform
Listen,
improve
Compare your speaking with
Björn's native voice
YouTube captions.
Save, learn, use.
Watch your favourite YouTubers and
save their words to learn later.
Learning has been
upgraded![]()
![]()
![]()
![]()
Björn lets you focus on learning what you care about,
not about keeping a streak unbroken.
Lessons shaped around your interests
Word-by-word pronunciation scoring
Match your intonation to native speakers
Learn words from YouTube videos you watch
Highlight any word for instant translation
Real conversations from day one
Feedback on grammar and word choice
Built for language learning
No streak pressure
- no credit card required -
FAQ
Find quick answers to common questions about features, plans, and more.