Less than one year ago, most of my clients were requesting iPhone app design. Today they are still asking for iPhone app design but many also say, “Do you do Android, too?” Most of them plan to start with one platform, see how things go, and then decide whether to invest in the second platform. This roll-out strategy is often tied into engineering costs. Since few developers possess the coding skills required for each platform—Objective C for iPhone and Java for Android—it’s often necessary to hire two development teams. But what about design? Would I, too, have to do twice the work when designing for the iPhone and Android? And what will happen if the Windows, Palm, and Blackberry app stores take off? Would I have to do five times the work?