The iPhone 3G is stuck on iOS 4.3, which is last year's OS. The iPhone 3GS runs the latest iOS. If you target iOS 4 as the lowest common denominator, you will r

The iPhone 3G is stuck on iOS 4.3, which is last year's OS. The iPhone 3GS runs the latest iOS. If you target iOS 4 as the lowest common denominator, you will reach everyone but the iPhone 1 buyers, which was discontinued July 11, 2008. I guess there might be a few in the wild, but good luck getting the battery changed. Targeting iOS 5 may be less wise. But even then, you will only be missing the customers who bought the cheaper 3G instead of the 3GS (about 2 and 1/2 years ago), or customers with 3 year old phones. Or people who haven't upgraded their OS, which will probably be more significant. With Android, you can target 2.2 (SDK released 20 May 2010), 2.3 (SDK released 6 December 2010), or 3.0 (SDK released 22 February 2011). And you won't find many customers with an early 2010 phone who've been able to update to 2.3, and few with a late 2010 phone who've updated to 3.0, the 2011 OS. Seriously, WTF? We might look back at this as time when Google made advances in the OS, but not a time when developers reached a large market. Kind of like the iPhone - iPhone 3G transition. Remember the hacks and jailbreaks then?