Privacy

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

You can sign in with a link we send to your email address, with a password, or with your Google account.

If you set a password, we never keep the password itself, only a scrambled form of it that cannot be turned back into it.

If you sign in with Google, Google sends us your email address, your name and your profile picture. We use the address to open your account; we never see your Google password.

The emails about your account — the sign-in link, the address confirmation, the password reset — are sent through Resend.

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.

Grammar of Music in AI assistants

You can practise with Grammar of Music inside an AI assistant such as Claude, ChatGPT or Grok. Without an account, the round you play is kept on our server for three hours and then deleted; it is linked to the assistant's connection, not to you.

If you connect your account, the assistant receives a token that lets it save your answers and read your progress on this site, and nothing else: it never receives your email address. We keep the answers and progress as we do for practice on the site.

We do not receive your conversation with the assistant — only the calls it makes to practise. You can stop the connection at any time by removing the connector in the assistant; write to us to revoke it on our side too.

Who the data is shared with

Google: measurement and ads, according to your cookie choice, and sign-in, if you choose to sign in with Google.

Supabase: sign-in and the accounts' database.

Resend: delivery of the emails about your account.

Stripe: payment, for subscribers.

Anthropic: what you write to the tutor is sent to the artificial intelligence model that produces the answer; the suggestions you send may also be read by it when we review them.

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.

To exercise any of these rights, or for any question about your data, write to [email protected].