iOS app downloads still twice Android downloads
The chart below is quite telling. Read it in the context of Android taking now 56% of the smartphone market share and you get an accurate picture of how different the average Android user is compared to an iOS user.
The great majority of Android devices on the market are low-end devices which are bought as cheap phones, by people who download maybe a couple of apps, and one is probably Facebook.
If you’re in the business of making apps, you’re targeting the app users market, not the smartphone users market, so keep these numbers in mind.