That's not a mystery (to me). I've worked at a company that made iOS apps, and it seemed to be common knowledge among all the other people we knew at other app/

That's not a mystery (to me). I've worked at a company that made iOS apps, and it seemed to be common knowledge among all the other people we knew at other app/game companies that Android users do not pay for apps. It supposedly has something to do with the fact that your average Android user has much lower income, and that in many countries where Android is dominant, people just are not willing to pay for apps.