Hardware supported social networking service for taking care of the wandering elderly people and lost pets. The technology is based on beacon tracking through a social GPS network of subscribers and volunteers. The coin-sized beacon includes built-in temperature and activity sensors. It runs on a single coin battery for up to one year and is easily integrated into clothing or a pet’s collar. The basic tracking beacon version costs ten times less than a regular GPS tracker. The extended beacon version additionally contains a GPS receiver, cellular modem and heart rate sensor. Our business model includes sales of the beacons and services, as well as ads.