Quizup is the best quiz app I have ever used. It contains many topics , I would say endless topics that are constantly updated. It contains quiz contents for science lovers , movie lovers , nature lovers , geography lovers , entertainment lovers and many more. One must need to register himself in it and then choose the contents in which he or she is interested in. After all this they will get to play live matches with people throughout the world who use the app. If played well you will also get ranked in the country and global level. It is a time based quiz , you will get 10 seconds to answer the question.The faster you awnser , the more points you will get. This app tests your reaction speed too. We can also make friends in it by following people and also chat with them . The app is really a very interesting of its kind. I think more people should use it as it provides joy and makes you stress free. I am also adding some pics from my experience.