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Only so your progress follows you between your phone and a computer. The whole course stays free to read without signing in.

Used only to record whether you are under 18. It changes nothing about the course itself.

Your date of birth is used only to know whether you are under 18. There is no tracking or advertising on this site.What we store, and why.

Still needed: your name, a valid email address, your date of birth, a password of at least 8 characters, the consent checkbox ticked.

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