Source google image: https://images.techhive.com/images/idge/imported/article/ctw/2011/03/08/spacetime-app-sales-android-vs-ios-100393739-orig.jpg
Android market revenue
Source google image: https://images.techhive.com/images/idge/imported/article/ctw/2011/03/08/spacetime-app-sales-android-vs-ios-100393739-orig.jpg