Privacy

The short version: we keep what you write here because judging it is the product, we never sell it or use it for advertising, and you can take all of it or delete all of it from your account page at any time.

What we keep

• Your account: your email address, and your name if you give one. If you sign in with Google, we receive your email, name and profile picture from Google and nothing else.
• What you write: what you want to be able to do (your goal), what it’s for and the date you gave, if any; on each page, your quick guess, every line of working, your answer, anything you say to the tutor or to a simulated reader, any answer you contest and why, and your words at the end; your answers in a book’s quick check, and the pages you said you already know; your answers to review questions; any note of the tutor’s you report as wrong, with what you said about it; and any text of your own you paste in to read.
• What we conclude from it: whether each step and answer held, which known wrong idea an answer matched, what the tutor said back and why, when each review comes due, and the lines of your learning profile, which are counts of what you did, never labels, each traceable to the pages it came from.
• Settings: which currency money is shown in (guessed from the country you visit from, or what you chose), whether you’re counted in published findings, and when you confirmed you’re 16 or over.
• Usage and cost: each tutor session you start and what its AI calls cost, which is how the free session and the members’ fair-use limit are counted.
• Payments: if you become a member, your subscription status and our payment provider’s customer reference. We never see or store your card.

Who processes it

• AI model providers. To map your goal and build its steps, grade answers in sentences, write the tutor’s notes and play a simulated reader, the relevant text (your goal, the problem, your working and answer, what you said) is sent to the model providers we use: currently OpenAI and Google models, reached mostly through OpenRouter. It’s sent to get a reply. We use paid API access, whose terms don’t allow the provider to train its models on what we send. Numbers are never left to a model: answers with a number are checked by our own code.
• Resend sends our emails: your sign-in codes and, if you leave them on, review reminders.
• Dodo Payments is the merchant of record for memberships and handles your card and billing details.
• Google, only if you choose “Continue with Google” to sign in.
• Google Analytics and Microsoft Clarity measure how the site is used: which pages are visited, where visitors came from, and what they click, open, slide or drag. Clarity also records how the page moved (scrolls, taps and clicks) so we can watch where people get stuck. Every screen with your work on it is masked, so neither is sent what you type or what you wrote, your email or your name; signed-in visits carry only an anonymous account number, so one person’s visits can be joined up.
• Our hosting and database providers, who store it on our behalf.

What other people can see

Nothing, by default. Your goals, steps, answers and reviews are yours. Two things are shared only if you choose them:

• A “How I learn” card. You pick the lines it shows and whether your name is on it; it shows them as they stood that day, and you can take it down.
• Published findings. The common wrong ideas people start with, counted across everyone who hasn’t opted out, with your first try the one counted. Nothing is published until at least 500 people are behind a finding, and no finding names or points to anyone. You can opt out on your account page.

A note of the tutor’s you report as wrong is read by the person who runs Cognosc, beside the note, to fix the tutor. Nobody else sees it.

Cookies and storage

Two cookies of ours: one to keep you signed in, and one remembering which currency you chose for money in problems. Your browser also remembers whether you chose light or dark mode, whether you want the tutor’s hints as you go or only after you answer, which link first brought you here, and your guesses on the free tests. Google Analytics and Microsoft Clarity set their own cookies to tell one visit from the next. No advertising cookies.

Email

Sign-in codes when you ask for one. A note that your goal is ready, if mapping it took long enough that you may have left. Review reminders at most once a week, only when something is due; every one has a link that turns them off without signing in, and they can be turned on or off from your account page. Nothing else.

Taking it, and deleting it

From your account page: “Download my data” gives you everything in “What we keep” as JSON: every page with its problems, your working, your answers, what you and the tutor said, your reviews, your quick checks, your learning profile, your shared cards, your reports, your settings and your ledger. “Delete account” removes your account and everything that is yours, immediately, and takes down any card you shared. A goal you published stays readable among the public goals, without your name. If you’re a member, cancel first so you aren’t charged again.

How long we keep it

For as long as you have an account. Deleting it deletes it. Sign-in sessions expire after thirty days without use.

Children

Cognosc is for people aged 16 and over. We don’t knowingly hold accounts for anyone younger.

Questions

Write to hello@cognosc.com. That includes any request to see, correct or delete what we hold — which you can also do yourself, from your account page.