Josh is a leading authority on mobile design, and author of TapWorthy: Designing great iPhone apps. In this interview, he answers questions about the differences between designing for web and for mobile, how to start with mobile design, how to design cross-platform apps, and how to test mobile apps with users. A crash course on designing and testing interactive user interfaces using Apple Keynote or Microsoft Powerpoint Keynotopia User Interface Libraries.Topics include:how to define and plan the user experiencehow to integrate wireframing/prototyping into the product lifecyclehow to decide the level of fidelity and details of prototypeshow to test with usershow to iterate user feedbackhow to move from prototyping to productionnbsp;Udemy is a website that enables anyone to teach and learn online. Udemy tries to democratize online education by making it fast, easy and free to create online courses. Udemy is an open platform, so anyone can build an online course by posting videos, presentations, writing articles, or hosting live virtual classroom sessions.