Researchers at the University of Exeter discovered that iPhones using the latest operating system keeps detailed records of where you've been.

At the O'Reilly Where 2.0 Conference, Peter Warden, of Data Science Toolkit, and Alasdair Allan, a researcher at University of Exeter, said they were looking to visualize information on phones. It might reveal things you didn't even know you were carrying around said Warden.