Iceland's population is about 360,000 and on a such a small island with little immigration, there’s a chance that you have distant cousins that you don’t even know about. There is also a chance for an Icelander to accidentally date them. It’s such a problem that in 2010, they even developed an app which could help them to check if their newly gained acquaintance is related to them or not. The Íslendinga-App uses information from another data base Íslendingabók, or The Book of Icelanders, a website that lists all Icelanders since the first immigrants in the 11th century and their relations to one another. But the app makes it more convenient, provides easy access to smartphone users, and has some other fun functions. Android users just have to bump their phones and they already know how closely related they are.