Handwriting → LaTeX
Scribble math. Get equations.
Write integrals, matrices, fractions with a stylus or finger. Gritzl recognizes the strokes and renders them as crisp typeset math you can edit, copy, and search.
∫ x² dx → ∫ x² dx = x³⁄3 + C
A thinking canvas, not another text editor
Notes that think
with you.
Gritzl is an infinite canvas notebook for students, writers, researchers and lifelong learners. Write by hand or by keyboard. Sketch a graph. Drop in a PDF. Ask the AI to explain — never to replace your thinking.
Built for how you actually learn.
One canvas. Everything connected.
Linked notes
A second brain that links itself.
Reference any note from any other with a tap. Build a knowledge graph as naturally as you take notes — backlinks included.
Voice → text
Transcribe lectures & ideas.
Hit record during class or while walking. Gritzl transcribes it on the canvas, ready to annotate, sketch over, and link.
PDF import
Drop a paper. Mark it up.
Import lecture notes, papers and textbooks. Highlight, draw on top, and ask the AI for a plain-English summary of any region.
Visualize ideas
Ask the AI to draw the plot.
“Show me sin(x) and its derivative.” “Plot the population data.” The AI generates an interactive chart right on the canvas — so abstract concepts become something you can actually see.
Human-first AI
AI to enhance thought,
not replace it.
Gritzl's AI is built to keep you in the driver's seat. It explains, plots, hints, rephrases, summarizes — but the canvas is yours. Every stroke and every word stays your own. You learn faster because the AI helps you do the thinking, not skip past it.
- Hints, not answers — by default
- Cites the part of your notes it's responding to
- Generates plots and diagrams to make ideas visual
- Ask it anything by lassoing a region of the canvas
Why does dividing by zero break things?
Try it on your canvas: pick a value of y and ask x · y = 1. As y → 0,
what happens to x? I'll plot it for you so you can see the asymptote.
Especially great for learning math.
Because math deserves more than a text box.
01
Write it the way you'd write it on paper.
Stylus, finger, or keyboard — Gritzl converts handwritten math into LaTeX as you go.
02
See the function, not just the formula.
Ask “plot this” and the AI drops an interactive chart on your canvas. Drag, zoom, learn.
03
Get a hint, not the solution.
Stuck on a step? Lasso it and ask. Gritzl nudges you forward without doing it for you.
Students
Lectures, problem sets, study sheets — all on one infinite canvas.
Writers
Long-form drafts, mind maps, marginalia. Linked by topic, not by folder.
Researchers
Drop a PDF, sketch over the figures, ask the AI for the math behind the claim.
Lifelong learners
The notebook that grows with everything you've ever wondered about.
Start a canvas. See where it takes you.
Start writing — free →Free to start · Works on iPad, Mac, Windows · Installs as a PWA