According to Business Insider, the most expensive apps are currently the "Got Cash?" app. This is a completely non-functioning app whose premise is simply to show off that you have the money to spend on a useless "trophy app". Cost is $200. Second is the "Vuvuzela World Cup Horn" which is an air horn app that sounds a very loud (and presumably annoying) horn when you touch the screen. It even touts that the horn will sound as long as you hold the screen... Also $200. Third is the "NSW Traffic" app. This is an Australian traffic app that seems to prove the traffic isn't bad enough Down Under to want another $200 app.