For the 2016 Olympics in Rio de Janeiro, Brazil, the Guardian US' interactive team built an interactive podcast app that takes you along a virtual audio tour of the marathon route. The app uses your phone to track your distance — what you hear will depend on how far you run (or walk!) and how fast. As you go, you'll unlock new audio segments at key moments along the route. I was responsible for the design of RioRun, which included the logo, app interface, badges icons, and social share images. Read about how we built it here. And take the tour yourself here (phone only).