Distimo’s May report just came out covering November 2009 to April 2010.
TechCrunch’s Robin Wauters summarized that on the Apple App Store, paid apps stay in the top 100 rankings much longer on average than free apps, which was a key finding by Distimo as well.
In looking at the report, I found something else that was not cited by Distimo in their key findings or by TechCrunch, and that was that Facebook’s free app was the only app to rank in the top ten for paid or free apps in both Apple’s App Store and Google’s Android Market. I’m a little surprised given the iPhone and Android support I see from top mobile app developers like Pandora, The Weather Channel, etc.