You can try this app for 14 days. If you like it, please purchase premium upgrade license.
It shows where he/she is on the map by inquiring location of the target device. It tracks location only when you ask for it.
-Location can only be tracked between devices which owners have agreed and registered as member by sharing passcode.
-Since it based on Google's push service, 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: