Your progress
Back up your practice history or bring it to another browser.
Practice history
Your saved answers survive the end of a drill and server restarts. This browser identifies your history with a cookie; keep a backup before clearing browser data.
A backup carries your review schedule and settings as well as your answers.
Restore a backup
Import adds to this browser rather than replacing it: anything already here stays as it is, and duplicates are skipped. Restoring into a browser with no history rebuilds your schedule exactly.