How Good Are AdMob's Smartphone OS Numbers?
IT Business Edge (blog)
The iPhone improved its share from 33 percent to 50 percent, while Android went from 2 percent to 24 percent. So, in terms of percentages, Android went from …
AdMob Reveals Android to be Apple's Biggest Smartphone Competitor
Android closing in on iPhone's US operating system traffic share
iPhone OS still dominates mobile web; Android on the way up