What should I do next?” — in this query pops up in our mind, the moment a particular activity has finished. It could be a film, a course of dinner, a book, a TV programme...the moment one ends, one tries to move ahead to something. And if one’s experience has been good, hopefully something else. Of course, getting the answer to that query is not easy. One can read reviews, consult friends, log into social networks and see “what’s happening” ...or one can simply download an app and let it work out things. Well, at least in the case of recommending films, music, apps to download and even people to follow on Twitter.