Using the Amber AlertGPS Companion App, caregivers can: (i) monitor the carrier’s location throughout the day, (ii) see when their carrier is near the home of a registered sex offender, (iii) call their device, (iv) change the SOS Emergency Contact number (the number that the device calls when the carrier presses the SOS button), (v) add and delete new users, and (vi) assign users the desired permissions.