For all the functionality that mobile apps have brought to our lives, we've also witnessed the unfathomable success of iFart, an early iOS app that did little more than simulate flatulence. But iFart also managed to generate more than $10,000 per day, and its success dropped the creative bar so low that just about everyone and his weird, unkempt cousin began working on apps that would, uh, capture the same magic.Related StoriesHow the iPhone has changed the way we shopiPhone 5S to get fingerprint scanner, suggests iOS 7 code
