Onavo is a great app that I’ve been using on my phone (HTC Desire HD) for a while now. It monitors the data usage of different apps and warns you of ‘rogue’ apps. It has used the data it has collected (anonymously) to create an infographic to show how iPhone and Android users differ in their us of social apps. Perhaps not surprisingly iPhone users are much heavier users of Facebook than Android users – could it be the fun/entertainment focus of iPhone = Facebook and the more professional, funtional approach of Android = Twitter?