Following the U.S. is China with a combined 35 million users of the dynamic duo with the U.K. next with 17 million users. France, Germany and Japan follow with 10 million users each.
To determine the total number of smartphone users in each country not using iOS and Android, Flurry used a formula involving IMF statistics, the size of the middle class based on a study, and estimated the size of the upper class. From that figure, the number of combined Android and iOS users were subtracted.
India had the smallest penetration of Android-iOS devices of the top ten countries with a total of just 3.4 million users out of a possible 75 million. Japan had the next smallest penetration with 10.2 million users of the pair compared with a potential 65 million smart device users in the country.
source: Flurry via AppleInsider