This app is designed to find location of family member, couple, your sweetie. This is not for finding lost phone.
It shows where he/she is on the map by inquiring location of the target device.
-Location can only be inquired between devices which owners have agreed and registered as member by sharing passcode.
-Since it based on GCM technology, battery consumption is very low. And no need to run this app beforehand. Just install and setup.
-It never uses mail or SMS for location inquiry. (It may use SMS for phone state inquiry.)
*List of reason of permissions can be found at: