Effective 9 November 2026
Essential sessions
DuodStudio uses the secure, HTTP-only dd_session cookie to connect your browser with its server-side session. It supports login, guest progress, CSRF protection and the authoritative fictional-credit balance. It has a maximum lifetime of 30 days, can rotate during login or registration and is removed on logout. Essential use does not enable advertising or make play credits valuable.
Saved choices and preferences
Your cookie choice is saved with your session or account so the service can honour it. Optional functional preferences can remember sound and presentation settings that you request. The site does not require optional cookies to browse, open a Preview or play. A new browser or clearing essential cookies can require a new choice and can disconnect guest progress.
Analytics and marketing
Analytics cookies are not used for this service. There are no marketing pixels or marketing-cookie choices for this service.
Your controls
The first-visit choices include equal access to accepting or declining optional use. Cookie Preferences provides separate functional and, when available, analytics choices. You can withdraw an optional choice later; the server and page update to honour the saved state. Withdrawal does not undo processing already completed when a prior choice applied.
Browser settings and questions
Your browser can also block or clear cookies. Blocking essential session cookies can prevent reliable login, guest progress, CSRF protection and saved play. Never clear cookies as a way to evade an account exclusion. For questions, use the Help Centre. Read the Privacy Notice for account, communication and infrastructure processing.
Open Cookie Preferences