betaFrom any source to a course you'll actually finish
Upload your material once. lrnos maps every concept, turns it into a game, and brings you back exactly when you're about to forget.
1 · Upload anything
PDFs, slides, docs, images, audio, video, web links, or a YouTube URL — drop it in and we read it.
2 · We map every concept
Your material is broken into bite-size knowledge units with 100% coverage, ordered into a clear path of lessons.
3 · Practice as a game
Each concept becomes exercises — fill-in, choice, matching, and more — with instant feedback, XP, and streaks.
4 · Remember it for good
A proven spaced-repetition schedule (FSRS) brings every concept back at the perfect moment, so it sticks.
Why it's different
Edit, add, or delete a source and your progress survives — the path updates itself instead of starting over. Nothing you learn is ever thrown away.
Common questions
What can I upload?
PDFs, Word/Slides/Excel, images, audio, video, plain text, web articles, and YouTube links.
How long until my course is ready?
Usually a minute or two. We notify you by email and push the moment it's done.
What happens if I change the source?
Your lessons and mastery carry over. We reconcile the changes and keep everything you've already learned.
Is there a free plan?
Yes — you can build and study courses on the free plan, with a monthly upload limit. Upgrade for more.