Very nice - I've been following Mixpanel closely for a few months and like what they have done so far. While mobile analytics, customer engagement and retention

Very nice - I've been following Mixpanel closely for a few months and like what they have done so far. While mobile analytics, customer engagement and retention calculation is very hot nowadays, technology is in its infancy (as opposed to web analytics). FYI - Countly (http://count.ly http://count.ly) is a real-time mobile analytics platform which is open source, which makes it possible to install it on your servers. It can track events (eg ARPU, revenues, levels passed etc), together with any data that can be collected from iOS & Android devices. I'm pretty sure we have many things to learn from each other, and come up with a standard definition of how to track mobile devices and a consistent terminology - which is something lacking. There are also unsolved issues like how to import and export data, to migrate from one provider to another. Wish you best of luck! :)