Frequently asked questions

Your notes are private to your account. We use them only to make your lesson.

Once your lesson is made, the files you uploaded are deleted. The lesson itself stays in your library until you delete it.

You can delete any lesson from your library. "Delete my account and data" on the Account page removes everything: your notes, lessons, progress and credit history.

Lessons are written by an AI model (Claude, made by Anthropic) following teaching instructions written by a math tutor. To make your lesson, your notes are sent to Anthropic for that one job. The way we use Anthropic's service, your notes aren't used to train AI models.

Read the privacy policy

Not yet. For now every lesson is private to your account, and only you can open it.

Shareable links are on our list for later.

Any math or math-related class: pre-algebra, algebra, geometry, trigonometry, precalculus, calculus (including AP Calculus AB and BC, and multivariable calculus), statistics (including AP Statistics), linear algebra, differential equations, discrete math and proofs.

The math in other classes works too, like physics, engineering, chemistry and economics. High school and college notes are both welcome.

We'll let you know politely that we can only make math lessons, and your credits go straight back to your account. Notes from a physics or economics class are fine as long as there's math in them.

Yes. Typed or pasted notes, photos (JPG, PNG, WEBP, or HEIC straight from an iPhone), PDFs and worksheets all work. You can add up to 10 files at a time, each up to 15 MB.

For the best results with photos: use good light with no shadows, hold your phone straight above the page, fit the whole page in the frame, and take one photo per page. Dark pencil or pen is easier to read than light pencil.

If we can't read your notes, you'll get a message saying so, and your credits come back.

Yes. The lesson solves every problem and teaches the method behind each one. Solutions are hidden behind "Show next step", so you can try each step yourself first.

Accuracy is the whole point. Every lesson is made with instructions to work each problem completely and double-check every step before writing it. If your notes contain a mistake, the lesson points it out gently and shows the fix.

Still, no study guide is perfect. If something looks off, check it against your textbook or ask your teacher, and use the "Report a mistake" button on the lesson so we can fix it.

Quick practice (from 15 credits) is short: a quick refresher on the main ideas, then lots of practice problems with hints and answer checking, a short concept check and a cheat sheet. Great the night before a quiz.

Full study guide (from 45 credits) covers every idea in your notes: why it works, a step-by-step method, worked examples, interactive visuals, more practice, a longer concept check, a full cheat sheet and a list of mistakes that cost points. Great for unit tests and finals.

Any up-to-date web browser. It's designed for a laptop, where lessons have the most room, and it works on phones and tablets too. There's nothing to install.

Every new account gets 30 credits for free. A Quick practice lesson costs 15 credits and a Full study guide costs 45 credits. Includes 1 PDF page or photo and 2,000 typed characters.

You pay for what you upload, page by page. Each extra PDF page or photo: +2 credits for Quick practice, +4 for a Full study guide. Each extra 2,000 typed characters (or part of them): +2 credits for Quick practice, +4 for a Full study guide. The upload form shows the exact price before you make the lesson, and that's what you pay. Nothing is ever added afterwards.

If a lesson can't be made (the notes aren't math, we can't read them, or something goes wrong on our side), the credits come back to your account automatically.

Every page of notes is read and taught from, so a 20-page PDF takes much more work to turn into a lesson than a page of notes. Pricing by size keeps short notes cheap instead of making everyone pay for the biggest uploads.

For example, a Quick practice lesson costs 15 credits from 1 page and 53 credits from 20 pages; a Full study guide costs 45 credits from 1 page and 121 credits from 20 pages.

You always see the price, and what it's made of, on the upload form before you click. It's worked out from what you upload, so it never changes after you click, however long the lesson turns out.

It's free to start, with 30 credits when you sign up.

After that, pick what suits you: a weekly plan ($5 a week for 50 credits), a monthly plan ($15 a month for 180 credits), a yearly plan ($150 a year for 180 credits every month) or top-up packs whose credits never expire. Plans can be cancelled any time from your account page.

The AP Calculus courses are separate: AB is $39 once and BC (which includes AB) is $49 once, no subscription. A parent can pay with an "Ask a parent to pay" link.

See pricing

Yes. You need to be 13 or older to make an account.

Go to the Account page and choose "Delete my account and data". It permanently removes your account, notes, lessons, progress and credit history.