One use for patterns is as a tool to analyze other irresistible apps. Rather than simply pointing at various parts of an application and saying “This looks like it works pretty well,” the motivational patterns library has given us a language to describe an application’s constituent parts. Looking at the overall pattern mix lets us see what desires are being met by the product and, just as important, which desires are not. Knowing where the motivational gaps are can help improve the design or identify needs that could be addressed with a new product. This is helpful, not just for improving products you create, but also as a way of studying your competitors.