The document compares the Windows Phone 7 Marketplace and Google Android Market. It finds that these two app stores had the highest growth rates in January 2011, at 30% and 18% respectively. While the app overlap between countries is over 97% for both stores, the Windows Phone 7 Marketplace has greater localization of popular apps between countries. The Google Android Market remains the only major app store with more free than paid apps. The Windows Phone 7 Marketplace has fewer top publishers than Android Market but is starting to attract large cross-platform developers.