Average hours spent on mobiles per day per user in 2021

Notice that this is just for Android mobiles. It's unclear why AppAnnie didn't include iOS usage in the chart. Possibly it has to do with Apple's App Tracking Transparency (https://techcrunch.com/2021/04/26/apples-app-tracking-transparency-feature-has-arrived-heres-what-you-need-to-know/).