Google Maps Location History

1. Turn Location History on or off with Google Settings

   1. From your device's apps menu, open Google Settings app or the Settings menu .
   2. Touch Location > Google Location History for the account you want to change.
   3. Turn Location History on or off for your account or devices:

    (Manage your Location History, Google Help)

This will allow you to see the location of your device or your loved one.
https://maps.google.com/locationhistory/b/0