Privacy
What this site keeps about you, why, who it is shared with, and how you decide.
Reading asks for nothing
Topics, articles, analyses and tools open without an account and without any personal data.
We count how many times each page is opened: one counter per day, by the page's address and the site the reader came from. The count uses no cookie and keeps nothing that identifies who visited.
Cookies and what stays in your browser
Some are needed for the site to work: the language you chose, the light or dark theme and, for a signed-in reader, the session.
Measurement and ads run for every reader. Measurement uses Google Tag Manager and Google Analytics to count visits and see which pages are read; ads come from Google AdSense.
Without your permission, this happens with no measurement cookies and no personalisation: visits are counted anonymously, without recognising your browser, and ads do not take your interests into account. When you accept, measurement starts using cookies, which recognise visits from the same browser, and ads become personalised.
You can change your choice at any time through the “Cookies” link in the footer.
If you create an account
To sign in, we ask for your email address and send you a sign-in link; there is no password.
We keep what the account needs to work: your profile (a display name if you give one, language, track and goal), your progress in the courses and in practice, with your answers and reviews, your conversations with the tutor and the suggestions you send.
If you subscribe, payment is handled by Stripe. We never receive or keep card details; we keep only the state of the subscription.
Who the data is shared with
Google: measurement and ads, according to your cookie choice.
Supabase: sign-in and the accounts' database.
Stripe: payment, for subscribers.
Anthropic: what you write to the tutor is sent to the artificial intelligence model that produces the answer.
DigitalOcean: hosting for the site.
We do not sell anyone's data.
Your rights
Under Brazil's General Data Protection Law (Law No. 13,709/2018), you may confirm whether we process your data, access it, correct it, ask for it to be deleted or moved to another service, learn who it was shared with, and withdraw consent you gave.
Withdrawing consent to cookies is immediate, through the “Cookies” link in the footer.