By user count, Android is clearly the leading smartphone operating system in the United States.
But according to ComScore, there are some considerable differences with iPhone owners. For example the median iPhone app user earns $85,000 per year, which is 40 percent more than the median Android phone user with an annual income of $61,000. Additionally, the average app usage time between both OS differs. iPhone users engage with their smartphone apps for nine more hours in a given month than Android users. You'll find more data about the Americans and their Apps in the "U.S. Mobile App Report".
This charts hows the top line platform stats for app usage in the States.
You will find more statistics at Statista