Privacy
Last updated: October 2026
What we collect
When you send a message from the contact page we keep your name, email, phone if you gave it, and the message. We use Google Tag Manager and Google Analytics to count visits and see which pages are read; these use cookies.
How we use it
Your message details are used only to reply to you. We don't sell or share them. Visit numbers help us see which content is useful.
Free tools
Focus timer stats are saved on your own device only and never reach us.
The interactive course
If you create a course account, we store your name, email, exercises and task answers so you can pick up where you left off and so your work can be reviewed. Task answers are sent to an AI service (Groq) for a first-pass review, without your name or email.
Want your data deleted?
Email us at the address at the bottom of the page and we'll delete any message you sent.