math, physics & chemistry
Paste a problem or raw LaTeX, and Eido works it out the way a tutor would — one step at a time, drawn as it explains, with the diagram building up beside the algebra.
No account needed to try a problem.
“A 4 kg crate is pushed with 16 N while friction resists with 4 N. Find its acceleration.”
m = 4 kg, F_push = 16 N, f = 4 N, a = ?
Why this step? Listing quantities with units first is what makes a unit check possible at the end — and it exposes anything the question forgot to give you.
narration: “Start by writing down what you know: a four kilogram crate, a sixteen newton push, four newtons of friction. The unknown is the acceleration, so circle it.”
Three subjects, with the problem types that actually show up in homework and exams. Anything conceptual outside these falls back to Eido's regular sketch engine.
Algebra and equation solving, systems, logs and exponentials, trigonometric identities, limits, derivatives and integrals — every rearrangement shown as its own line.
Force problems get a free-body sketch before a single number moves. Motion problems get axes, curves and a labeled timeline of what changes when.
Balanced equations with the mole road-map drawn out, so unit conversions stop being a guess and become a path you can see.
The problem is pulled apart first — givens with units, the unknown, the governing concept — then every manipulation becomes its own card with a properly typeset formula, not a plain-text approximation.
Free-body sketches, coordinate axes, plotted curves, triangles with angle marks, charts and flow chains are drawn as sketchy vectors right in the browser — instant, exact, and the same ink as the rest of Eido.
The board fills in as the narration plays, and every line carries a “why this step?” explainer: why that move is legal, why that formula, why the units land where they do.
Study & STEM mode in 40 seconds
Chunked reading, character webs, then a derivation solved one step at a time.
Narrated · captions on screen · about 40 seconds
Type a word problem or paste a textbook excerpt. Prose and notation can be mixed in the same block.
Paste $$F = ma$$ or \frac{1}{2}mv^2 directly, or drop in a .tex file. Formulas are parsed and typeset, and variables are extracted for the derivation.
Upload a PDF, .docx, .txt or .md problem set and pick the problem you want worked out. Long sets are chunked so you can walk one question at a time.
Photograph your own working, a textbook question or a whiteboard. Eido transcribes the page, you correct anything it misread, then it goes onto the solving board.
Work at your own pace: pause on the step that lost you, ask “why this step?”, and replay the narration until the move makes sense. Before an exam, run last term's problem set through and keep the cheatsheets as a revision stack instead of rereading a textbook.
Build explainer material for someone else. Work a problem once, then hand out the board: a printable walkthrough for a lesson, a Cornell-style guide for note-taking practice, or a cheatsheet stapled to a homework set.
take the board with you
The problem statement, a given/unknown box, every derivation step with its diagram in a grid, and the key takeaways — sized to one printable page.
Cue column, notes column and a summary strip at the foot of every page, with the sketches sitting in the notes so the layout is ready to write on.
Turn steps into two-sided visual flashcards, or export the whole board as slide images for a lesson.
Crate on a rough floor — cheatsheet
Given
m = 4 kg · F = 16 N · f = 4 N
Unknown
a = ? (m/s²)
takeaway: subtract friction first, then divide by mass.
Paste it in, watch it get worked out, and keep the sheet.
