The market for smartphones is only about mid-60% of all Americans, though, from what I've read. So still not 10%, but more like 25%-ish.

Well, the original comment was "10% of earners" and I'd bet that smartphone penetration is higher among earners (eg 20% of Americans are under 14, 0% of them are earners and ??~10% of them have a smartphone). So you could perhaps push it up to more like 1/3 earners use iOS, which is starting to be a healthy potential market share.

> 20% of Americans are under 14, 0% of them are earners and ??~10% of them have a smartphone

OT but 10%? I'd've guessed at least twice that.

I just made it up, I don't even know anyone under 14.