Good roundup of iTunes Store numbers (with subsequent inferences) by Horace Dediu.
I meant to include the following chart in our Q2 2013 overview, but I didn’t have time to create it. Below, you can see how the 850,000 App Store apps Apple touted last week are divided across the iPhone and iPad after the launch of each device’s App Store (July 2008 for iPhone, April 2010 for iPad).
The increase you see after the iPad’s 30th month corresponds to October 2012 – when Apple unveiled the iPad mini.
(click for full size)