Free plan, no card needed
Your learning,
crafted for you.
Tell Crafyu what you want to learn. Get a personalized course with researched lessons, an AI tutor, interactive practice, and a learning path built around your goals.
- Every lesson cites its sources
- Claims checked before publishing
- Delete your account and data any time
Illustration of the lesson screen
How it works
From a sentence to a course
You stay in control at every step, and you can start reading while later lessons are still being written.
- Step 1
Tell it what you want
A short interview finds your goal, starting point and how deep to go. Tap an answer or type your own.
- Step 2
Agents research
Current sources are found, read, scored for credibility and screened for hidden instructions.
- Step 3
You approve the plan
Review the outline and ask for changes in plain words, or skip straight to building.
- Step 4
Lessons are written in parallel
Each lesson gets its own agent. Open the first ones while the rest are still being written.
Building “Retrieval-augmented generation”
One agent per lesson, working in parallel
Capabilities
Built for actually learning
Not a wall of generated text: a course that teaches, checks itself and adapts to you.
Hybrid search combines keyword matching with embeddings, then a cross-encoder rereads the best candidates3.
Every claim cited
Hover a footnote to read the exact passage, its publisher and a credibility score. A verifier checks claims before a lesson is published.
Concepts linked across the course
Each idea is taught once and linked everywhere it's used.
Retrieval-augmented generation conditions a language model on passages retrieved from an external corpus at inference time.
Rewrite anything for you
Simpler, deeper, an analogy, a diagram. Only you see your version.
Why does reranking help?
A tutor that knows your course
Answers cite the lessons and sources they come from.
Why is a cross-encoder more accurate?
Quizzes with real feedback
Adaptive questions, written feedback on short answers, a mastery report.
12 days
Habits that stick
Daily goals, streaks and spaced-repetition flashcards that come back right before you'd forget.
See where it came from
Citations you can actually check
Lessons are grounded in sources the agents read, not a model's memory. Pages that try to smuggle instructions to the AI are flagged and left out.
Example lesson excerpt
Reviewing material in several short sessions beats one long cram. Recalling an idea from memory is itself practice, which is why quizzes help more than re-reading, especially when they come with feedback.
Select a footnote number to see its source.
1Example: textbook chapter94% credibility
“Spaced practice produces better long-term retention than the same amount of massed practice.”
In a real course this card links to the original page, and the course's Sources tab lists every source with its score.
Example topics
Start from one of these, or anything else
- Build it
Kubernetes from zero
Beginner · example topic
- Build it
Statistics for A/B testing
Intermediate · example topic
- Build it
Organic chemistry essentials
Intermediate · example topic
- Build it
Music theory basics
Beginner · example topic
- Build it
Personal finance in your 20s
Beginner · example topic
- Build it
Spanish for travel
Beginner · example topic
Pricing
Start free. Go Pro when it clicks.
Every feature is in both plans. Pro gives you more credits, more and bigger courses at every depth, and keeps them for as long as you subscribe.
A short overview uses fewer credits than a 20-lesson deep dive. You always see your balance, and nothing is charged beyond the plan price. Teams or schools? Get in touch.
FAQ
Questions, answered
A chatbot gives you one answer at a time with nothing to check. Crafyu researches sources first, plans a path from where you are to your goal, writes a structured course with diagrams and checks, cites every claim, links concepts across lessons, and then tests you and tracks what you've mastered.