If it is possible to do it in Java ME, then Java ME is the best. It is so easy to code for, it is the most widely deployed by far, and it is easy to port to And

If it is possible to do it in Java ME, then Java ME is the best. It is so easy to code for, it is the most widely deployed by far, and it is easy to port to Android and Blackberry. Unfortunately, there are a lot of cases where the user experience with Java ME is sub-optimal to native apps or some capability is exposed only via the native API. Windows Mobile is probably the worst because it has a pretty low market share, it is expensive to get started, and it is pretty tedious to code for. Symbian is the most tedious to code for but it has a huge market share. The iPhone SDK is the only way to make iPhone apps, and the iPhone is obviously very important so you can't ignore it. It was the most expensive to get started for because it more-or-less requires the purchase of a Mac. Android is easy to code for right now but I've heard that the Cupcake update is causing a lot of people pain. When more devices from more manufacturers are released on more carriers, we may find that Android is not much better than Java ME in terms of ease-of-coding.