The way it works is simple and, luckily, secure. You won't be able to track anyone who doesn't want to be tracked, which is good. Instead, you'll be able to add friends to Line (or Facebook) only if they accept you.
Once you have your LINE HERE group made, you'll be able to see their pictures move across the map. Just click on one of them to see exactly where they are, including the street name and how far away they are from you.
LINE HERE is a very useful GPS app. You'll always be able to keep track of your kids, for example, since you'll know exactly where they are.
Requires Android 4.1 or higher