Your data
Everything you read, save, and learn lives in this browser.
Account
An account keeps your library in step across your devices — the texts you have added, every word you have saved, where you stopped reading, and when each word is next due. Reading here does not need one, and nothing you have already saved is lost by making one.
Backup
Your imported texts, saved words, review schedule and reading positions, as one file. Restoring merges with what is already here and keeps whichever version is newer, so it is safe to run twice.