Phone Finder is a universal app (works on iPhone and iPad) comes handy for all those who wish to track family’s multiple iPhones and iPads without logging into multiple accounts. All the iPhone’s or other iOS devices that you want locate requires the internet connection otherwise the Phone Finder won’t retrieve the GPS location of your lost or stolen device.
How to configure:
After installing the app you need tap edit in the account tab and tap '+' button on top left of the screen and then enter your Apple ID credentials. All done now after some seconds you will see all your devices with a valid gps position on the screen tapping the button 'Map' on the bottom left.
See larger Screenshots below..