The application is used to configure and monitor connected APP-100 tracker devices from Hunter Electronics. It shows on google satellite maps tracker device position, route, distance from user, tracker battery level and speed. Several trackers can be added to same account on app.Please note that app needs functional internet service for communicating with devices. It also uses SMS messages for device wakeup.Device Link:http://hunter-electronics.net/dog-gps-collars/dog-gps-collar-gps-app-100/