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Signing in is only ever about saving your stuff. Your XP, your finished lessons, your quiz levels: they follow you to any phone or laptop instead of living in one browser that a cleared cache can wipe.
You never need an account to learn here. Every lesson, quiz, and game works signed out, exactly like it always has. There is no paid tier, no marketing email, and no newsletter hiding behind this button.
We store your email (that is how Google says it is you), your farm name if you pick one, and your progress. Nothing else, ever, and you can delete all of it from this page in one click.