According to an analytical company App Annie Android Apps beats IOS Apps in generating revenue in this year. Android Apps generate more revenue than IOS due to third party apps store like Samsung and Amazon Apps store.
An estimated google play store alone generate $42 billion and other third party store collectively generate $36 billion in current year by App Annie. Android generate total $78 billion and as expected IOS generate $60 billion.
According to App Annie google is solo competitor of Apple IOS, Apple App store continue to out sell Google App store by lead of $20 billion every till 2021.