Privacy, plainly.

Without an account: nothing

You can use the entire site — every lesson, demo and quiz — without an account. Your Academy progress is then saved only in your own browser (localStorage); it never reaches our servers. We also collect anonymous page-view statistics (Google Analytics) to see which pages people find useful; these are not linked to any account or identity.

With an account: three things

If you choose to sign in, we store: your e-mail address; a name and avatar if you sign in with Google (only what Google shares); and your Academy progress — completed lessons and quiz scores. That is the complete list. No ads, no selling of data, no tracking tied to your identity, no marketing e-mail — the only e-mail we ever send is the sign-in link you request.

Signing in sets one strictly-necessary session cookie. We use no advertising or cross-site cookies, which is why this site has no cookie banner.

Where it lives

Account data is held with our service providers: Neon (database, hosted in the EU), Resend (delivers sign-in e-mails), Google (only if you use Google sign-in), Vercel (hosting) and Upstash (abuse-prevention counters). Each processes data solely to provide this site.

Deleting everything

Open your account page and choose Delete account. It erases your e-mail, sign-in methods and all saved progress from our database immediately and permanently — self-service, no e-mails, no waiting period. That is your right to erasure, honoured on the spot.

If you are young (many of our readers are)

Accounts are optional and store almost nothing, but if you are under 16, please check with a parent or guardian before creating one. Everything on the site works without signing in.

Questions about your data: robberttorfs@gmail.com. Last updated 27 July 2026.