In general I always recommend downloading a music festival's app if you are attending, and Arroyo Seco weekend is no exception. The apps are great for seeing the lineup, checking out the food availability, and finding your favorite food vendors within the festival grounds. Today Arroyo Seco launched their new app, roughly a week before the festival will debut in Pasadena. The app has all sorts of nifty features, including the full lineup and the ability to make your schedule and share it with friends. It seems they are still developing the app as there are many things missing such as the festival map, food and drink information, and more. That said, it's still a useful tool and will allow you to share your schedule with your friends in the meantime while the rest of the app is being created.