Mixpanel is also crazily expensive. I am using mixpanel to track email sends and app opens for iphone apps, and at 1.2 million events a month, this would cost $

Mixpanel is also crazily expensive. I am using mixpanel to track email sends and app opens for iphone apps, and at 1.2 million events a month, this would cost $350 a month. That's just insane for a graph that shows daily opens.