Mobile App Store Market Share Based On Usage

As you may have guessed, Apple App Store enjoys the lead when it comes to app store usage. However, when the application marketplace is taken overall to include those from carriers such as those from AT&T and Verizon, the difference is not much. Here is a study from Nielsen that looks into the usage based market share of the various app stores

Apple App Store : 25%
Blackberry App World : 16%
Verizon Application Store : 15%
AT&T Application Store : 12%
Sprint Application Store : 10%
T-Mobile Application Stores : 8%
Windows Marketplace : 4%
Android Market Store : 2%
Palm App Store : 1%
Handango : 1%