Privacy Policy | MathGPT.now

The short version

When you sign in, Google tells us four things: an account ID, your email address, your name, and a link to your profile picture. That is the entire account record.
Your Google password never reaches this site.
A problem you type and a photo you upload are sent to an outside AI provider to be answered.
Because you have to be signed in to use the tutor, the problem you typed and the answer you got back are saved to your account so you can reopen them at your solver history. You can delete any of them there, one at a time. The photo file itself is never saved.
Practice progress, saved graphs, and notebook pages live in your own browser and are never sent to us.
There are no ads, no analytics tags, and no third-party tracking scripts on any page.

What signing in actually does

Signing in uses Google, and only Google. You are sent to Google, you approve the request there, and Google sends back a signed token that proves who you are. We check that token, then save a small row in one database table. The calculators, guides, and formula library do not ask you to sign in at all. Only the AI tutor does, because every tutor answer costs money to produce and an account is how we keep that under control.

The four things Google tells us

We ask Google for the smallest set of permissions that lets an account exist: openid, email, and profile. From that we keep exactly these fields, plus the date the row was created and last updated.

A Google account ID, which is a long number that identifies you to Google and to nobody else.
Your email address, which is how we recognise your account and how you can ask us to delete it.
Your display name, so a page can greet you.
A web link to your Google profile picture. We store the link, not the image.

What we never receive

These are not choices we made carefully; they are things the sign-in method makes impossible.

Your Google password. It is typed on Google's site, never on ours.
Your contacts, calendar, files, or anything else in your Google account.
Your date of birth, phone number, or home address.
Any payment details, because nothing on this site is paid for.

What happens to a problem or a photo

This is the part people most want a straight answer about, so here it is. When you send a problem to the tutor, the text (and the photo, if there is one) travels from your browser to our server, and our server passes it straight on over an encrypted connection to the outside AI provider that writes the answer. The answer comes back and goes to your screen. The tutor requires an account, so at that point we also write the problem text and the answer text into our database, attached to your account, and they appear at your solver history. The uploaded image file itself is still never written to the database or to disk; when you send a photo without typing anything, the saved question is a fixed placeholder line, not the picture. What the AI provider keeps on its side is governed by its own terms, not by this page, so treat anything you send as leaving our control.

What your solver history holds, and how you erase it

Only signed-in people can use the tutor, so there is no anonymous version of this to worry about: if there is no account, nothing is written. Each answered question creates one conversation row with a short title, plus two message rows.

The problem text exactly as you typed it, saved as the "user" message.
The tutor's full answer, saved as the "assistant" message.
A title made from the first 60 characters of your question, so the list is readable.
The times it was created and last updated. Nothing else, and no copy of the image.
Open /history, press Delete on a conversation, and both messages go with it immediately and permanently.

The checks a photo goes through

Before an image is sent anywhere, the server checks it. These limits exist for safety and cost, and they are the reason you sometimes get an error instead of an answer.

It must be a PNG, JPG, WEBP, or GIF. Other file types are rejected.
It must be under 8 MB and under 25 megapixels.
It must be a real, readable image. A file that only pretends to be an image is rejected.
An empty file is rejected before anything is sent.

What you should not upload

The safest rule is to send the math and nothing else. Crop the photo before you send it.

Names, class lists, student numbers, or a grade report in the corner of the picture.
A live or proctored test. The academic integrity page explains why this matters beyond privacy.
Anything confidential that happens to share the page with the math.
Somebody else's work or personal information.

Everything we hold, in one table

This table is the whole picture. If something is not in it, we do not collect it. Where the honest answer is "our code does not do that", the table says so rather than promising a retention period that nothing in the software actually enforces.

What MathGPT.now collects, why, how long, and how to remove it
What we collect	Why	How long we keep it	Can you delete it?
Google account ID, email, name, and profile picture link	To create your account and sign you back in later.	In one `users` table, from your first sign-in until it is deleted. The code sets no automatic expiry.	Yes. Email [email protected] from the address on the account and the row is deleted. There is no self-service delete button yet.
Your Google password	Not needed. Google checks it and sends us a signed token instead.	Never received, so never stored.	Nothing to delete.
The math problem you type, and the answer the tutor gives back	It is the question the tutor answers, and saving the pair is what lets you reopen it later at your solver history.	Sent over an encrypted connection to the AI provider, and written to our `messages` table against your account, with a short title in `conversations`. The tutor needs an account, so this only ever happens for a signed-in person. The code sets no automatic expiry.	Yes, by you, immediately. Open /history and press Delete on that conversation. Deleting the whole account removes every conversation with it. The provider still holds its own copy under its own terms.
A photo of a problem you upload	So the tutor can read a handwritten or printed problem.	Checked, converted for the request, and sent with it. The image file is never saved to disk or to the database. If you send a photo with no typed question, the saved history entry is a fixed placeholder line instead of the picture.	There is no stored copy of the image to delete. Delete the conversation to remove the answer that was written from it.
Your sign-in cookie, named `mathgpt_session`	Keeps you signed in and carries the token that proves a form came from this site.	Up to 30 days, then it expires. It is marked HttpOnly and SameSite, so other sites cannot read it.	Yes. Sign out, or clear cookies for this site.
Work saved in your browser: practice progress, saved graphs, notebook pages, study plan, light or dark theme	So you can pick up where you left off.	In your browser's local storage until you clear it. It is never sent to our server.	Yes, entirely by you. Clear site data in your browser, and it is gone.
Server error records	So we notice when the tutor is broken.	The code records that a request failed and the status code it failed with. It does not log your problem text or your photo.	There is nothing about your problem in there to delete.

Work that stays in your browser

A large part of this site never talks to our server at all. The graphing calculator, the scientific calculator, the matrix tool, the geometry board, the notebook, and the practice tracker all run inside your browser and save their work in your browser's local storage. Clearing your browser data deletes that work permanently, and we cannot get it back for you, because we never had a copy. The flip side is the good part: nobody at MathGPT.now can see what you graphed or which practice questions you missed.

On a shared or school computer

Local storage belongs to the browser profile, not to you. Anyone using that profile afterwards can open the same saved work.

Sign out when you finish, which clears the session cookie.
Clear site data for mathgpt.now if the work was personal.
Use a private window when you do not want anything kept at all.
Remember that a school-managed device may keep its own records that we know nothing about.

Cookies, trackers, and security

There is one cookie: the sign-in session. There is no advertising cookie, no analytics tag, no social media pixel, and no cross-site tracker anywhere on this site. You can check that yourself by opening the page source or the network tab in your browser. On top of that, the server sends a content security policy that only allows the page to connect back to this site, so a script on a page cannot quietly ship your data somewhere else. Traffic runs over HTTPS, and the sign-in flow uses the current Google standards, including a one-time value that stops a stolen sign-in link from being replayed.

How to delete your data

There are three separate piles, and they are deleted in three different ways.

Browser work: clear site data in your browser. Instant, and completely in your hands.
Solver history: open /history and press Delete on a conversation. The question and the answer are removed from the database straight away, with no email and no waiting.
Account row: email [email protected] from the address on the account and ask for deletion. A person removes the row, and every saved conversation is deleted with it.
You can also remove MathGPT.now from your Google account permissions at any time, which stops future sign-ins.
Deleting the account does not reach back into the AI provider's own records, which is why we tell you not to send anything sensitive in the first place.

Children, changes, and questions

This site is written for students, and plenty of them are under 18. We keep the account record as small as we can for exactly that reason: an ID, an email, a name, and a picture link is not a profile of a child. If you are a parent or a school and you want an account removed, email us from an address connected to it and we will do it. If this policy changes, the page changes with it, and the change is made in the same update as the code it describes. Questions go to [email protected], and the terms of use cover the rest of the relationship between you and the site.

Make the choice that fits the material

Match your caution to the material, not to the convenience. If a problem can be done in a calculator, it never leaves your browser at all, and that is the most private option on the site. If you need the tutor, crop the photo to just the math and delete names, class details, and anything else in the frame first. On a shared or school computer, sign out and clear site data when you finish, because saved work belongs to the browser rather than to you.

Questions people ask about this page

Do you sell or share my data?

No. There is nobody to sell it to and nothing worth selling: the account record is an ID, an email, a name, a picture link, and the math questions you chose to save by using the tutor. We do not run ads, we do not carry an analytics tag, and we do not pass your details to a data broker. The one outside company that sees anything is the AI provider that writes tutor answers, and it sees only the problem you sent.

Is my uploaded homework photo stored on your servers?

The image itself is not. It is read into memory, checked for type and size, encoded into the request, sent to the AI provider, and dropped when the request finishes. It is never written to the database and never written to disk by this application. The answer written from it is saved to your solver history, along with your typed question or, if you typed nothing, a fixed placeholder line. Delete that conversation and both are gone. What the provider keeps is up to the provider, so crop out anything you would not want leaving your device.

Do you keep the problems I ask the tutor?

Yes, for signed-in people, because that is the feature: your questions and the tutor's answers are saved to your account and listed at your solver history, newest first. Only you can see them; every read and every delete is matched against your own account id, and asking for somebody else's conversation returns a plain "not found". Press Delete on any conversation to remove it permanently.

Why do I have to sign in for the tutor but not the calculators?

Because they cost different amounts to run. The calculators run in your browser and cost us nothing per use, so they are open to everyone with no account. Each tutor answer is a paid request to an AI provider, and an account is the simplest way to stop that being abused.

How do I get my account deleted?

Email [email protected] from the address on the account and say you want it deleted. We remove the row from the users table, and the database removes every conversation and message attached to it at the same time. There is no delete button for the whole account in the interface yet, and we would rather tell you that than pretend otherwise. Individual saved conversations you can delete yourself at /history.

Do you use cookies to follow me around the internet?

No. There is exactly one cookie, and it only keeps you signed in. It is marked HttpOnly and SameSite, which means other websites cannot read it and cannot use it to act as you. Nothing on this site is designed to recognise you anywhere else.