Privacy Policy

SFILL provides interactive coding practice. This policy explains what information is used when you learn on the site.

Information you provide

If you create a learning profile, SFILL stores the username and progress needed to continue your practice. Passwords are stored as one-way password hashes.

Cookies and local storage

SFILL uses a session cookie to keep you signed in and to protect account actions. Progress is associated with your profile so the dashboard can show completed lessons.

Advertising

SFILL may display Google-served advertising on the public homepage. Google and its partners may place and read cookies, use web beacons or pixels, and use IP addresses or similar identifiers to serve, measure, and personalize ads according to applicable policies. For details, read How Google uses data when you use our partners' sites or apps. You can manage advertising preferences through Google Ads Settings.

Contact

For privacy questions, contact the SFILL team through the contact page.

Last updated: September 19, 2026