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Yes — sessions can be paused by default. If you want a session you can't back out of, turn on Hard Mode for that routine or schedule; with Hard Mode on there's no pause and no early exit until time runs out.

Yes. Null is built on Apple's Screen Time framework, so shields go up and come down on schedule whether or not Null is open. You'll also see the active session in Live Activities, the Dynamic Island, and Home Screen widgets.

Null Pro is billed through your Apple Account, not Null directly. On your iPhone, open Settings → [your name] → Subscriptions, choose Null, and manage or cancel from there. Changes take effect at the end of the current billing period.

Your Screen Time activity is processed on your device, and your sessions, routines and AI conversations stay on your device — we never see them. Null doesn't require or create an account.

Open Null → Account → Erase All Data. This removes routines, schedules, focus history and AI chats stored on this device.

Screen Time access to block apps and measure focus, and notification access for reminders and Live Activities. You can revoke either at any time in Settings.