Last updated: May 2026
When you create an account, we store your email, name, username, and optional profile details. We also record your learning progress, XP, streaks, and exercise results so the platform can work for you.
Your data powers sign-in, progress tracking, leaderboards, and certificates. We do not sell your personal information to advertisers or data brokers.
Code submitted in lessons or challenges is processed to check answers and show results. Do not include passwords, API keys, or other secrets in your submissions.
We use session cookies to keep you signed in. Display preferences (such as dark mode) may be saved in your browser.
You can request access, correction, or deletion of your account by contacting us through the contact page.
We may update this policy from time to time. Continued use of the site means you accept the latest version.