Locate an Iphone

I saw a recent publication that said about the iPhone Operating System, to locate a person.

If the person you want to locate has an iPhone then the best way to locate that person is through the “find my iphone” application.

It is a native application of the iPhone IOS system, in which you insert the person as a member of your family and manage to locate the cell phone in real time.

This is the best way to locate your wife, husband or family members by iPhone cell phone. Means other than the native device will not be efficient.

It was on a private detective Comando Detetives site.... Is there any other way to find the iphone other than "find my iphone"?