by Josh Clark
Designing for touch means you're doing more than just slinging pixels: you’re designing a physical interface to be explored by human hands. Just as surely as if you were soldering circuit boards, molding plastic, or shuffling die-cast buttons, your design defines the physical experience of the device, with honest-to-god ergonomic issues. Explore how industrial-design principles apply to mobile app design, and learn the rules of thumb (and fingers) that describe the best app designs.