Imagine if you could peek into your users' checking accounts and see what they earn. In a way, you can. A creative new API from big data trailblazer InfoChimps uses IP geolocation to return U.S. Census data, including annual income. There are also updates to the company's Twitter influence and trust data APIs.
Of the many things that developers need to worry about when attempting to create a successful app, two points rise to the top. First, the app can't crash, and second, it has to respond to user input quickly. This is easier said than done, however, thanks to a deck that's stacked against developers. Crittercism spent a month collecting over 1 billion data points and determined which devices, operating systems, and networks best lead to stable - and profitable - apps.