USERS: You will need to enable the bundled accessibility service. Contrary to the language of the standard warning message that appears, the accessibility service does not "observe your actions" or "retrieve window content". You can confirm that this app does not have permission to access the Internet, so no information is collected.

DEVELOPERS: Your game should contain one (and only one) view that is focusable, focusableInTouchMode, and focused, and has an attached accessibility delegate in order to receive the fingerprint input. That accessibility delegate should use code like this: