So just how is your App doing? Got calls on your API? How many? StatHat API makes it possible to answer these types of questions statistically and to chart the data to pick out trends and patterns. Seeing is comprehending.
Infographics have played an increasingly visible role in communicating complex analytic data in an easy-to-digest way. Until recently infographics were hand-crafted by graphic designers with a special interest and ability in data communications. Visual.ly has made a name for itself by authoring web-based data visualization applications that can be customized and populated on an individual level.
Chart APIs are useful and popular, and Google knows how to do them well, so they're continuously adding more features and options for customization to their Visualization API. The Google Code Blog recently highlighted a few of the newest features.