YouTube video courtesy of GoogleMobileBlog

If you develop apps for Android based phones or the iPhone, Google might have an app analytic tool for you...

Introducing Google Analytics for Mobile Apps

Google Analytics is best, and perhaps only, known for its ability to provide detailed information about website traffic and use. Google Analytics for Mobile Apps provides similar kinds of information and analyses for Android and iPhone mobile apps. It can tell what is being used within an app as well as information such how many people are using your current release compared to older versions.

BTW: In case you were wondering... Yes, there is a Google Adsense for mobile apps too (in beta)...

Google Adsense for Mobile Applications