Every month, Android Developers puts out an update on the Android ecosystem and how each of its parts are fairing in the current market. Just a couple of months ago, Android KitKat stood at 20 percent of the market. As of yesterday, this stat has grown to 30 percent.
Much of this growth has come at the expense of Jelly Bean, which lost about 6 percent since August to Android KitKat. However, all of the older versions of Android lost share to KitKat this time around, including Gingerbread and Ice Cream Sandwich.
all of the older versions of Android lost share to KitKat
It’s important to note that this chart isn’t including the recently released Android Lollipop. We likely won’t see that version make a huge dent in the rankings for a few months as devices are updated.
It’s also important to note (via) that because this data is gathered from the new Google Play Store app, which supports Android 2.2 and above, devices running older versions are not included. However, in August, 2013, versions older than Android 2.2 accounted for about 1% of devices that checked in to Google servers (not those that actually visited Google Play Store).