Android 4.0 "Ice Cream Sandwich" is a version of the Android mobile operating system developed by Google. Unveiled on October 19, 2011, Android 4.0 builds upon the significant changes made by the tablet-only release Android 3.0 "Honeycomb", in an effort to create a unified platform for both smartphones and tablets, whilst simplifying and modernizing the overall Android experience around a new set of human interface guidelines.