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Permission prompt
A system dialog asking access to camera, location, or notifications.
A permission prompt is the modal the operating system shows when an app first needs access to something private — camera, microphone, location, contacts, push notifications. The user must tap Allow or Deny.
Time it well. Show a short pre-prompt screen explaining why you need the access before triggering the system dialog. If the user denies, they cannot easily change their mind, so do not ask until they will see the value.