It checks your maths as you write.
A pen-first notebook for university maths. Write by hand; when the pen rests, SolveNotes circles the mistake, writes the next step beneath your working and graphs the function beside it.
Free for 7 days. Pay only if it works for you.
Free to join. Nothing to pay, and no account is created today.
What it does
Everything happens on the page, in the margin of your own writing.
Checks every line
When the pen rests, SolveNotes reads the page and checks the working with a computer algebra engine. A real mistake gets a red ring and a one-line reason; the next lines are written beneath your own, in typeset maths. A line that is right gets a tick. If it cannot read a line, it asks instead of guessing.
Graphs float beside the problem
A function, an equation in x or an integral opens a graph window on its own, tied to the problem by a thin line. Pan, pinch, resize, drag it anywhere, or close it. The area under an integral is shaded between its limits.
Ask why, or just a hint
Circle any line and ask why it holds; SolveNotes explains that step, not the whole problem. Switch to Hint when you want a nudge rather than the answer, or Just compute when you want the result at once. Coming next: a live sheet where changing one value recomputes the page.
Checked, not guessed
A model reading your page can be confidently wrong. SolveNotes does not take its word for it.
Two 60-page tests of the current checking pipeline, every page with its answer and some with planted mistakes: one set typed, one in real handwriting from a public benchmark, laid out neatly. Messy lecture notes are harder than either, and that is the test that matters next.
The maths is verified
The first time a model alone read our test page, it accepted x = 6 for 3x + 5 = 20 and was 97% sure. So SolveNotes' computer algebra engine substitutes every answer back into the problem, evaluates integrals, limits and sums, and differentiates antiderivatives. A red mark needs the engine, or two independent judges that agree; one judge's doubt becomes a soft "check this?".
Honest when unsure
Reading handwriting is the hard part. On the standard handwritten-maths benchmark SolveNotes' reader scores at the published state of the art, which is very good and not perfect, so when it cannot read a line with confidence it asks you, with its best guesses a tap away, instead of marking a guess. Every answer sheet has a button to report a bad answer.
Pricing
One plan, everything included. The first week is free; keep it only if it works for you.
or $47.99 a year ($4.00 a month, save 33%)
- 7 days free, on your own homework
- Unlimited pages and notebooks
- Checks, Just compute, Hint and Ask why
- Graph windows and the full solution sheet
- Every feature in "Coming" below as it ships
- Cancel any time in Google Play or the App Store
SolveNotes will be a subscription with a free trial. Pricing will be announced before launch; joining the waitlist is free.
The full tour
A minute, silent: a 3D surface, a Bode plot, answers computed as you write, the live sheet, the check with its graph and solution sheet, why a mark can be trusted, a table that becomes a plot, matrices, an ODE, export, and how it asks when unsure.
Where it stands
SolveNotes is in development. Here is what works today on a Galaxy tablet, and what the waitlist is for.
Ready now
- Low-latency pen on endless grid pages, notebooks, lasso, undo, PDF and PNG export
- Checks on pause: red rings, reasons, typeset working you can keep or swipe away
- Check, Just compute, Hint and Ask-why modes
- The full solution in a sheet, exact or decimal
- Fix a misread: hold the pen on a line to correct what SolveNotes read
- Floating graph windows for functions, equations and integrals
Coming
- Live sheet: definitions hold for the page, change one value and every result updates, units checked
- Export as typeset PDF, LaTeX, Python or MATLAB
- 3D surfaces, Bode and Nyquist plots, data plots from tables
- Sync between devices and a profile that learns your hand
- Android and Apple at launch: tablets, phones and Chromebooks, iPad and iPhone
Questions
Can I download it now?
Not yet: it is in a closed test on Galaxy tablets. Leave your email and we send you the download link when your place opens. The first week is free; after that it is $5.99 a month, only if you keep it. We email you twice: the download link, and the launch.
Which devices?
Android tablets and phones (Android 10 and later), Chromebooks, iPad and iPhone. Any pen works; an S Pen or Apple Pencil gives pressure, and the S Pen's side button erases. The closed test starts on Android tablets.
How well does it read handwriting?
At the published state of the art for handwritten maths, which is very good and not perfect. When it is unsure of a line it asks you rather than guessing, and a correction takes two taps. A check takes about twenty seconds today; the video compresses that wait.
How accurate is the checking?
Wherever the engine can, it verifies the answer itself: substitution back into the equation, evaluation of integrals, limits and sums, differentiation of antiderivatives. A red mark needs the engine, or two independent judges that agree. On our two 60-page tests with planted mistakes it caught every one and raised no false alarm; those pages are neater than lecture notes, so your own pages are the real test, and every answer sheet has a report button.
Does it do the homework for me?
Only if you ask it to. The default checks what you wrote and shows the next step from your last correct line. Hint mode nudges without answering. Your teacher's rules are yours to keep.
What happens to my pages and my data?
A page is sent for checking and not kept afterwards. Your handwriting is never used to train a model. The email you leave here is used for two messages: the closed test and the launch. This site sets no cookies and uses no third-party trackers; it counts visits and clicks itself, without identifying you.
When?
The first people on the list get a closed test before the public launch. We will email when it is your turn, and we will not promise a date we do not have.
Try it free for a week
Get the download link by email when your place in the closed test opens. Then $5.99 a month, only if you keep it.
Be first to try it
Join the waitlist and be among the first testers.