Leave a lesson and your place is kept; come back and pick up right there. A finished quest is announced at the end of the lesson, and the reward is marked on the Arena tab. Tablets get a readable column and a two-column course shelf. You can change your display name in Settings. The notification permission is asked during onboarding, where it is explained. Privacy: other learners' profiles show public details only; the app no longer asks for tracking permission and drops unused permissions.