I remember seeing a study not too long ago that examined how many apps a typical user on each platform downloaded and how many they paid for. The iPhone users were just a little more spendy than the Android users.
Now, there is a whole lot more competition in the App Store and Android is growing a lot faster. So I suspect the real answer is Android, but that is just conjecture and doesn't take into account the iPad.
Now, there is a whole lot more competition in the App Store and Android is growing a lot faster. So I suspect the real answer is Android, but that is just conjecture and doesn't take into account the iPad.
I wish I could remember where that study was.
Edit: Magneus linked to what I was thinking of