As with many UX projects, iteration is the key. After several rounds of wireframes, the features were set for the first version of The Great Courses iPhone app. There were many exceptional ideas, but in the end, several features were dropped and/or postponed for later releases. Shown here are the final wires and visual design. The app allows customers to sign-in with their current account information, in order to access their digital library, and stream courses that they have previously purchased.