Your learning stays yours.

All lessons and exercises are public. No account is required to study.

Guest practice

Your saved words, answers, drafts and review progress stay in this browser. Clearing browser storage removes them. Use a personal device for personal introductions. Guest practice is not automatically uploaded when you sign in. You can choose to import saved words, review history, completion and saved reviews into your own account. Account wording is preserved for matching words; guest reviews stay separately resumable. A private import checkpoint prevents repeated imports from double-counting answers. Personal introductions and unfinished browser drafts are not imported. You can preview the words and review progress before confirming. The browser copy is kept, with a local marker to avoid offering the same import again. Your latest import has a private undo record that survives refresh. Undo removes unchanged imported additions while preserving later edits and practice; importing again replaces the previous undo record.

Optional accounts

Sign in with Google or email to save your learning progress to your private account. Each account can access only its own learning records. Some unfinished drafts and picture practice positions remain browser-specific. You can download an account backup under Lessons & backup.

Optional analytics

With your permission, we record section names, approximate country, UTC date and active time. A random daily browser identifier estimates daily visitors. No raw IP addresses, emails, typed answers, saved words or introductions are stored in analytics. Country is inferred by the hosting network; it may be inaccurate or unavailable. Analytics records are retained for up to 90 days and are visible only to the owner.

You can decline analytics and use every learning feature. Change your choice through Analytics preferences in the learning page footer. Declining stops future collection; anonymous past counts cannot be linked back to your account.

Hosting and sign-in

This site uses Cloudflare hosting and Supabase authentication. These providers process requests and authentication under their own policies. The site's analytics settings do not control hosting security logs.