KitKat now on nearly a quarter of Android devices
After Jelly Bean and KitKat, Gingerbread (Android 2.3.3 to Android 2.3.7) is next covering 11.4% of Android devices (down from last month's 13.6%). To show you how old that build of Android is, consider that the final update to 2011's Motorola ATRIX 4G was Android 2.3.6. And yet, you can find this build on better than one out of every ten Android powered devices. Ice Cream Sandwich, accounting for Android 4.0.3 and 4.0.4, is on 9.6% of Android phones and tablets. That is off a full percentage point from the reading of 10.6% that this build garnered last month.
Google put together these readings from Android devices that visited the Google Play Store, for the week that ended September 9th.
source: AndroidDevelopers via AndroidandMe