It was only a matter of time, but Apple’s App Store is no longer the mobile market leader it once was.

For years Jobs’ Mob has bragged that it has the most apps and makes the most money from its app Store making it important that developers make sure their code is represented.  However analytics firm App Annie said that all that is slowing down.

The App Store will fall second to the amount of revenue generated by Android app distributors, predicts. In 2017, the App Store will generate $40 billion in revenue, which is not bad, but is being outclassed by Android app stores run by Google and other parties which will generate $41 billion.

The gap will widen in 2021, with Android app stores generating $78 billion in revenue and Apple’s App Store fall to $60 billion.

The surge in revenue for Android comes from a growing number of consumers in China who are buying Android phones and are willing to pay for apps. In 2021, App Annie expects there to be eight Android smartphone users to every single iPhone user in China.