Your AI teaches. Cairn remembers.
A memory for everything you study with an AI tutor: how well you know each topic, what’s fading, and what to study next.
No account needed — your study history stays in your browser.
Works with the AI you already use
You forget on a curve. Nothing is measuring it.
A month on, the chat with your tutor is still there — every question, every answer. What’s gone is your recall of it, and nothing you use can tell the difference.
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Tuesday, 9pm
Bayes’ theorem, worked through end to end. Clear as day.
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Seven days on
You could probably rebuild it. Probably.
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Thirty days on
Was it P(A|B), or P(B|A)?
You bring the AI. Cairn keeps the record.
Cairn never writes anything for you. It gives your AI a precise prompt, then checks every reply before it touches your data.
1 of 5 · Copy a prompt
Give your AI this prompt, with your syllabus.
You are converting a course syllabus into a structured JSON object for a study tracker. Output only valid JSON matching this exact schema — no markdown fences, no commentary, no extra fields.
- Each topic: {topic_id, title, status, …}
- status: always "not_started" for a fresh syllabus. Do not invent scores, dates or difficulty values…
Here’s my Linear Algebra syllabus. [pasted]
Nothing was saved. One thing to fix:
difficulty
Remove it — difficulty is measured, not declared.
Checked. This is what will be added:
Linear Algebra — 4 sections, 22 topics
- Vectors & Spaces · 6 topics
- Matrices · 5 topics
- Eigenvalues & Eigenvectors · 6 topics
- Orthogonality · 5 topics
Start Vector operations.
First in your course. Everything it builds on is in place.
- Vector operationsnot started
- Linear independencenot started
- Subspacesnot started
- Matrix multiplicationnot started
- Determinantsnot started
- Eigenvaluesnot started
A test counts for more than a feeling.
When you log a test, Cairn doesn’t just note the score. The topic’s curve resets, and it fades more slowly afterwards — because recall you actually performed is evidence, and a feeling isn’t.
Start with one course.
Your AI turns the syllabus into topics; Cairn keeps track from there. Your study history stays on your device. An account is optional.