My books or progress are missing

Book files and reading positions are stored on the device or browser where you created them and do not sync. Notes, highlights, bookmarks, flashcards, your dictionary, collections, canvases, research workspaces and voice notes sync only when Settings → Sync is on and you are signed in with the same account on both devices. If something is missing, check that Sync is on (it shows when it last synced and any waiting changes), that you are signed in to the same account, and that app or browser data was not cleared.

Something wrong or missing? Tell us.