Navizon GPS app uses peer-collected GPS data linked to cellular tower. Navizon claims peer-to-peer location detection. It’s off by a few hundred yards, but this is a lot better than the total lack of location awareness that the iPhone officially enjoys. The app is free for the first 15 days, after that, the software costs $24.99. A caveat: It crashed Chen’s phone, but it worked great for me. And this is only version 1.0, but maybe the real question is why wasn’t this functionality built into the iPhone?”]
Source: https://gizmodo.com/iphone-faux-gps-hack-works-and-is-awesome-301459