Cookies

Last updated: 4 November 2026. This page matches the Privacy Policy.

Yumio is run by Alexandro Ghanem, a sole trader trading as Prismwell Labs, Radcliffe, Greater Manchester, UK (transferring to Prismwell Labs Ltd on incorporation, as explained in the Terms of Service).

Yumio sets two cookies so you stay signed in. There are no advertising cookies and no analytics cookies.

yumio_session

HttpOnly, Secure on the live site, SameSite=Lax. This is the sign-in cookie. The site needs it to know who you are. It is not readable by page scripts.

yumio_refresh

HttpOnly, Secure on the live site, SameSite=Lax. This refreshes the sign-in cookie when it expires. Same rules as yumio_session.

Saved on this device

Your browser also stores:

• your sign-in tokens;
• your light or dark theme;
• whether you've signed in before;
• your email, if you tick "Remember email";
• offers you've dismissed;
• unfinished practice paper drafts, so you don't lose work.

Those are not tracking cookies.

Managing cookies

Clearing cookies signs you out of Yumio.