Capture lectures, work through equations, visualize ideas, and ask Lemma AI for help, all without leaving your notebook.
All 100 beta seats are claimed
Existing members can sign in — everyone else can keep exploring in guest mode.
Free during beta · No card required
Watch a lecture become a finished, synced note — captured on the walk out of class.
01Your library
Every screen here is the shipping app — the same library, composer, and note reader you get on day one.
Offline capture, sync later. Basement lecture hall? Capture now — it uploads the moment you reconnect.
Drop in a lecture PDF, photo, or recording. Ask Lemma for a summary, and structured notes land on your canvas.
Add equations, graphs, and tables, then drag them into a layout that makes the whole idea click.
| x | f(x) | f′(x) |
|---|---|---|
| 0 | 0 | −2 |
| 1 | −1 | 1 |
| 2 | 4 | 10 |
Select any step and ask Lemma to explain, solve, or check it. The verified result goes straight back onto your canvas.
✓Checked 2 commands — syntax, math, layout
✓Verified against canvas
✓2 boxes createdNo copy-paste, no second tab. Lemma reads the note you already have open — the equation you selected, the lecture you captured this morning — and writes its answer straight onto the canvas, as blocks you can edit.
The answer arrives as real canvas objects — a text box, typeset maths, a plotted graph, a table, a code cell. Placed, aligned, and yours to edit like anything else you wrote.
Photograph the board or record the hour on your phone. Lemma transcribes it, writes it up as structured notes, and has them waiting on your desktop canvas. No signal in the hall? It uploads when you reconnect.
Photograph your working, or point at it on the canvas. Lemma reads the maths off the page and marks the line where it breaks — naming the rule you skipped, rather than handing back the answer.
Type /quiz and the lecture you just wrote becomes practice questions with the answers hidden — so you have to recall them, not reread them. Try one:
Every answer is solved a second time — from the original question, by a model that never saw the first draft. If the two disagree, a third solve settles it.
No more wrestling plain text into formulas. Text, math, graphs, code, tables, and drawings live side by side on a single zoomable canvas.
# Differentiate f(x) = x³ − 2x import sympy as sp x = sp.symbols("x") fp = sp.diff(x**3 - 2*x, x) print(f"f'(x) = {fp}") print(f"f'(2) = {fp.subs(x, 2)}")
| Trial | [HCl] (M) | Δt (s) | Rate |
|---|---|---|---|
| 1 | 0.10 | 54 | 1.9×10⁻³ |
| 2 | 0.20 | 27 | 3.7×10⁻³ |
| 3 | 0.40 | 14 | 7.1×10⁻³ |
Pan and zoom across an endless workspace. Group a whole course, then collapse it to a single tidy note.
Write prose and drop into LaTeX-quality equations inline. Numbered, aligned, and beautifully typeset.
Plot functions, data, and vectors in 2D. Adjust parameters and watch the curve update live.
Interactive 3D surfaces are planned. The beta supports 2D function plots.
Run JavaScript snippets beside your derivations. Store and highlight Python and other languages.
Structured data with units, computed columns, and quick conversions for lab work and datasets.
Molecular structure rendering is planned. Use equations, text, images, and drawing for chemistry notes in the beta.
Automatic diagram rendering is planned. Draw diagrams or annotate an uploaded image in the beta.
Sketch free-body diagrams, circuits, and annotations freehand, with stroke stabilization and snap-to-grid guides.
Free during beta. Paid plans and tier pricing are coming after beta.
Everything, free while we're in beta.
Coming after beta · For everyday coursework.
Planned for serious STEM majors.
Coming after beta · Labs, departments & classes.
Need the full breakdown? Compare all plans
More careful than a chat tab. With Review on, Lemma re-checks its own work up to six times before you see an answer, and every step lands on your canvas where you can verify it. It can still make mistakes, which is exactly why it shows its work instead of just an answer.
They're yours. Notes are stored in your account, synced across your devices, and exportable as JSON from the desktop canvas. We don't sell your data — see the privacy policy for the details.
Nothing. Every feature is free during the beta and no card is required. When paid plans launch you can pick one then, or stay on the free tier.
Capture does. Photos, recordings, and quick notes taken on mobile are saved locally and sync when you reconnect. Lemma AI needs a connection to think.
Use equations, 2D graphs, tables, JavaScript, images, and sketches for STEM coursework. Chemistry structure rendering and automatic diagrams are planned.
Join the beta and study with a notebook that works through problems with you.
All 100 beta seats are claimed
Existing members can sign in — everyone else can keep exploring in guest mode.
Free during beta · No card required
