The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Nick A:
Try Five Trivia challenges your knowledge in five different areas: Culture, Geography, History, Science and Technology, and Sports in a series of quick questions designed for busy people. In a couple minutes of your day, you can keep your general knowledge up to date and discover new facts to share with your friends.Every question gives you a second chance if you fail to guess the answer correctly the first time.The new update includes a connection to the Game Center. This lets you track your personal Achievements and the Leaderboards allow you to track your progress against your friends and others around the world who play the game.Be a winner!