sin(α + β) = sin α cos β + cos α sin β
cos(α + β) = cos α cos β − sin α sin β
⇒ tan(α + β) = sin(α+β) ⁄ cos(α+β)
= (tan α + tan β) ⁄ (1 − tan α tan β) ✓
A page from your notebook.
Connect the Dots you learn.
A graph of everything you’ve studied.
AI cursor that works inside your notes.
You take notes. An AI cursor draws on them to explain what you're stuck on — so you can connect the dots.
It becomes a dot. Linked, automatically.
Find tan(75°)
tan(75°) = tan(45° + 30°)
= ?
↑ FROM YOUR NOTES · 14 OCT · p.42
You derived tan(α + β) last week. Click to revisit.
The app spots your stuck step. Cites your own page.
02 / The mechanism
Two things, at once.
A
A graph that grows as you study.
Every page you write becomes a node in the graph, and every derivation - an edge. The graph notices when today’s problem touches yesterday’s lesson, and connects them. You don’t maintain it. It maintains itself.
B
An AI that lives inside your notes.
Not a chat window. An AI cursor that highlights, annotates and writes alongside you. Stuck? It opens the page from last term where you’d already worked it out, walks you through your own thinking, and writes the next step in the margin.
d ⁄ dx (sin² x)
= d ⁄ dx [(sin x)²]
= 2 (sin x) · d ⁄ dx (sin x)
= 2 sin x · cos x
By the way — this is the double-angle identity sin(2x) hiding in there. You derived it on p.42 last term. Want to see the connection?
tap to explore →03 / Our thesis
Three things we're betting on.
Connecting new concepts to past learning is how understanding deepens.
Grounding explanations in what you've already studied helps you actually understand — not just get an answer.
AI inside the canvas beats AI inside a chat.
Tablet note-taking is mainstream — its interactivity isn't.
Millions of students learn by writing on iPads daily, but no solution on the market uses what they wrote to help them learn.
04 / Who
Building from inside the problem.
Co-founder
Mariia
Co-founder
Levi
05 / The beta