I want to track another iPhone live. Is it possible to install Apple's own iPhone tracker on someone's iPhone and follow the phone online if I know the login info etc? What 3rd party apps can do this? I've searched iTunes but they all require the person with the iPhone to send an email first. I guess as long as that tracking is activated and is permanent I could use one of those apps since I have access to the phone and could send an email to myself to get permission from that iPhone.