Last year, for the inaugural Mobile Nations Fitness Month, I took a look at P90X for iPhone, what was then the absolute best bootcamp-style fitness app available for iOS. A year and several updates later, and it's Fitness Month, and I'm curious to see how well P90X has stood the test of time. Is P90X still the best way to kick your backside that you can carry in your back pocket? Let's find out!
