The first pie chart is split by hardware and shows only adoption (a good thing), not fragmentation. The second pie chart is split by OS ID strings. While it s

The first pie chart is split by hardware and shows only adoption (a good thing), not fragmentation. The second pie chart is split by OS ID strings. While it shows fragmentation, it hugely exaggerates it because it counts all builds of a given version, say of 2.2, as unique even though they are built from the same or similar (i.e. bugfixed) sources. Besides that, there a a lot of single digit builds that are unidentifiable based on the name - what version of Android are the two copies of "Interceptor V5", for instance? As a thought exercise, imagine what that pie chart would look like for any phone OS other than iOS. Symbian http://en.wikipedia.org/wiki/Symbian_OS http://en.wikipedia.org/wiki/Symbian_OS and Windows Mobile http://en.wikipedia.org/wiki/Windows_mobile http://en.wikipedia.org/wiki/Windows_mobile (soon to become fragmented again as WP7) both have several major version (i.e. true fragmentation) and many, many different handset manufacturers and flavors within each major version.