Overall fragmentation within Android continues to rise, in terms of both hardware and software. OpenSignal recorded nearly 12,000 distinct Android devices this year and operating system versions remain primarily split among 3 different major Android releases (Gingerbread, Ice Cream Sandwich, and Jelly Bean). In no uncertain terms, the report asserts that Android is "the most fragmented it has ever been."
this is all completely off topic but that is talking about versions of the Android OS running on cell phones and has nothing to do with apps.
the market is fragmented because so many old versions are still being run.
