The X Factor UK is a popular game show, and with good reason. With this app, you can participate as a fifth judge, ringing in your votes via your wi-fi or data connection wherever you are. You also get the chance to enjoy certain feelies and other extras that are included with the app, sweetening what's already a free deal. The only potential drawback is that the app collects some information about you, but really, it's not something most people need to care about.