Cairn turns any source into a structured, adaptive course — with multi-style explanations, smart quizzes, a study tutor, and spaced review that makes learning actually stick.
Running in supabase mode · works with or without an API key.
Module 2 · Core Ideas8 min
Why systems beat goals
A goal is a moment; a system is a habit. Goals set direction, but systems do the walking…
# systems# habits
Simple
Analogy
Visual
Quiz 4/5
“Distractor explained clearly.”
5
explanation styles
∞
sources accepted
2
ways to run it
Everything you need to learn deeply
One calm workspace that turns passive reading into active, durable understanding.
AI course builder
Paste an article, upload a doc, drop a link, or name a topic. Cairn structures it into modules and lessons with clear objectives.
Explanations your way
Re-explain any concept simply, in depth, by analogy, visually, or with a worked example. Five lenses, one idea.
Adaptive quizzes
Auto-generated questions check understanding and explain every answer — including why the distractors are wrong.
Study chat (RAG)
Ask anything about your material. Cairn retrieves the right lessons and answers from your own course, not the void.
Spaced repetition
A built-in scheduler spaces reviews so what you learn actually sticks — graded good / hard / again.
Runs anywhere
Deploy to Vercel + Supabase, or run the whole thing locally with zero external services. Same code, your choice.
How Cairn works
1
Feed it a source
Text, a URL, a PDF, or just a topic you're curious about.
2
Cairn builds the path
Modules, lessons, key terms, and objectives — generated and saved.
3
Learn, quiz, chat
Read in your style, test yourself, and talk it through with your tutor.
4
Let it stick
Spaced reviews keep the knowledge warm long after the first read.
Designed to feel like a good book
Warm forest greens and amber on cream, set in Inter. No cold blues, no purple gradients — just a calm place to think. And it respects your setup: run it on Vercel + Supabase, or entirely on your own machine with a local data store.
Forest
Moss
Amber
Terracotta
Cream
Start stacking knowledge today
Create a course from anything in under a minute. Free to run, yours to keep.