Usability

What's usability? Basically it's the ease of use and learnability of a system, in our case a mobile website built with HTML5 and JavaScript. Much has been done to enhance user experience in the past five years with technologies such as Ajax, user-centered design, and page-as-an application metaphors. In fact I would say user experience is probably the best it's ever been, but that translates differently to the iPhone and iPad because you have the following additional constraints.

• Small screen size
• Smaller memory
• Slower performance
• Slower download
• Awkward input

Sometimes constraints are good because they cause you to focus on the essentials; other times they make things downright difficult to work. Here are some tips to help you out.