Privacy policy
Local first
Learning progress is stored only in your browser's localStorage and is never uploaded by default. Only after you create an account and sign in are changes synced as an operation log for multi-device merging.
Analytics & cookies
Analytics is off by default. De-identified page views are sent only if you explicitly allow statistics in the consent banner. Advertising cookies are a separate opt-in, also off by default. Login cookies are strictly necessary and never used for tracking.
Files & retention
Entry pages accept no uploads. Files uploaded on the tools site exist only while being processed; result links are signed and expire after 30 minutes. Learning progress is deleted when you clear local data or delete your account.
To delete an account or export data, export a backup from My progress and contact us.