Michael Simmons, co-creator of the Fantastical app (#1 Apple Store app), talks with host Jeffrey Zeldman about artificial intelligence and machine learning, why iOS 7 is more than a skin job, the design of Fantastical (and Fantastical 2), the Apple ecosystem, sweating the details, developing a natural language parser, reinventing calendar software, why “you have to ship,” how to stay inspired on a long-term project, how to do a huge launch with no budget, what Microsoft was great at, Apple’s product design strategy, starting simple, human interface guidelines, and more.