Family Tracker, an app that runs on Android (Rs. 267) and iOS ($3.99 or approx Rs. 211), is a system where parents can keep a tab on their children by equipping them with smartphones. The idea behind the app is to alert parents that their child/children may be missing and also to help parents locate their missing children. The app was used earlier this year by a mother living in Georgia in the United States, to locate her 14 year old boy who had been missing. Granted, it's not the only app that provides such a service; however, it already has more than 1,00,000 users and is available worldwide. The selling point of the app is that it allows parents to keep tabs on their children without having to call or message them.