Ice Cream Sandwich runs on 3 percent of Android devices

Android™ 4.0, otherwise known as Ice Cream Sandwich (ICS), is the most advanced version of Google's popular mobile platform, as it combines code for both smartphones and tablet computers. In breaking down the usage of different versions of the OS, the Android Developers blog reveals that ICS is now run on 2.9 percent of Android devices.

Android 2.3, or Gingerbread, is the most popular version of the OS, Google says, as nearly 66 percent of devices run it. Second in line is Android 2.2, better known as Froyo, which is run on 23.1 percent of devices.

Google has pushed ICS as the most sophisticated Android yet, but its low adoption rate months after its release is puzzling to some industry experts.

"A surprising 7 percent of all Android devices are still running old versions of the platform. That goes all the way back to the original version 1.5 from the platform launch," ZDNet's James Kendrick writes, referring to the oldest versions of Android.

However, Google continues to push ahead with ICS, announcing that updates to the platform would begin rolling out in early April 2012. The company did not say when all devices would see version 4.0.4.