Seadog
iPF Noob
A major firm that keeps track of such things, has found over 4000 versions of Android in use, giving new light on how serious fragmentation of the system is. Of the 4000 devices found using a version of Android, over a third of them were using one-off custom versions. Over 50% were using Ginger Bread (down from 64%) and only 5% were using ICS.