The number of mobile devices and the apps that coincide with them seem endless, but the question remains, how will developers ensure users keep coming back to their apps? How will application publishers make their apps stand out and keep consumers longing to use them? One possible answer is Persistent Location (PL), a new phenomenon within the realm of check-in based services. Services such as Foursquare and Gowalla require active participation from the user, in that they… Read more »