This is the Android SDK for Quettra Portrait that allows developers to access and integrate the functionality of Quettra Portrait with Android applications and devices through Java. Quettra Portrait is a mobile intelligence platform that allows for user personalization.
Have you noticed the many tools to share your location? There's FourSquare and Gowalla, both about a year old. Then there are old-timers like Brightkite. And now, there's one that works with all three (and a couple more).