Smartphones are nowadays a common device with millions of users around the world. They can execute thousands of applications that support any interest of users: productivity, mail access, internet navigation, entertainment, tourism, etc. These applications transform the experience of using a smartphone to something similar to use a pocket extension of a personal computer. They are not simply PC software ported to smartphones, but applications that have been created from scratch to be adapted to these devices in order to take full advantage of the possibilities of smartphones. Among these applications we find geographical applications, like Google Maps (Google 2012) or OSMAnd (2012), that allow users to have access to a map anywhere and at anytime and to be positioned and located thanks to the GPS capacities. Some applications even take advantage of the compass and accelerometer and are able to find out what the user is looking at or
where the user is moving to. Other applications may also offer navigation functionalities, able to guide the user from one point to another.