Privacy policy

Last updated: 28 September 2026

Word Trio is a free English vocabulary quiz. This page explains what information the site keeps and why.

If you do not sign in

Your progress in each level, your word list and your settings (language, sound, theme) are saved only in your own browser using local storage. They are not sent to us. Clearing your browser data removes them.

If you sign in with Google

Sign-in is handled by Google Firebase Authentication. When you sign in, we receive:

• a user ID created by Firebase,
• your name, email address and profile photo from your Google account, used only to show who is signed in.

We store your progress in each level and your saved words in Google Cloud Firestore, linked to that user ID, so you can continue on another device. Security rules allow each signed-in person to read and change only their own record.

What we do not do

• We do not sell or share your information.
• We do not use advertising or tracking cookies.
• We do not ask for your Google password. Google handles it directly.

Services we use

• Cloudflare Pages hosts the website and may keep standard server logs, such as IP addresses, for security.
• Cloudflare Web Analytics counts page visits in aggregate. It does not use cookies and does not track individual visitors.
• Google Fonts supplies the typefaces.
• Google Firebase provides sign-in and the database for signed-in users.

Deleting your data

Sign out to remove your data from the browser you are using. To delete the data stored with your Google account, open a request on the project's GitHub issues page and we will remove it.