Geo-fences can be used, for example, to track when family members arrive at or leave work, school or home. Once set up on a phone, Life360 allows the administrating phone to set geo-fences defining chosen areas. Life360 is a family communication, location and alert app for smartphones that allows users to share their locations with each other. This easy-to-use program offers tons of safety features, but its constant monitoring system will drain your battery. Life360 - Family Locator +more is a helpful application that allows you to monitor your family's activities through GPS tracking and private communication.