It's difficult to get a statistically meaningful sample from anyone but Apple, and Apple isn't talking. You must also decide what your audience is - OS numbers

It's difficult to get a statistically meaningful sample from anyone but Apple, and Apple isn't talking. You must also decide what your audience is - OS numbers for "web surfers" are different than "game players" are different than "Facebook users." Here's another chart showing a huge undercurrent of 2.x users: http://www.sunflat.net/en/iphoneoscount/index.html http://www.sunflat.net/en/iphoneoscount/index.html My own numbers show about 27% of my users running 2.x, and I suspect it would have been higher if I didn't restrict my app to 2.2 and above.