Privacy policy

When you create an account we store your name, and your email address or phone number — whichever you registered with. If you set a password, we store only a cryptographic hash of it, never the password itself.

As you study, we record which lessons you have completed and where you stopped in a lesson, so you can pick up again. We also record notes and bookmarks you create.

If you request a paid course, we store the request, its status, and the amount, so payment can be reconciled and confirmed.

We do not sell your data. We do not share it with advertisers. We do not use third-party advertising or cross-site tracking.

We do not store card numbers, because payment is arranged directly with us rather than processed on this site.

We use two cookies. One remembers your language so the site loads in the right one. The other keeps you signed in; it holds a random session token and is not readable by JavaScript.

Neither is used for advertising or profiling.

A certificate you earn carries your name, the course, the issue date and a unique ID. Anyone holding that ID can confirm the certificate is genuine on our verification page. That is the point of it being verifiable.

The verification page shows only the name, course and issue date — nothing else about your account.

We keep your account and progress for as long as your account exists. You can ask us to delete your account at any time.

When an account is deleted, issued certificates are retained so that previously-shared verification links keep working. Tell us if you want a certificate revoked as well.

For any question about your data, or to request deletion, contact us through the contact page. A person will reply.