The Rock 'n' Roll Marathon Series app developed by Dilltree Inc is a free lifestyle app available on the Android platform. The app brings together music and running to create a world-class experience for runners of all levels. It provides real-time tracking and event information for athletes, their families and friends for all events in the US.

With this app, participants can get real-time updates of their times, paces, estimates, and places. The app also features interactive course maps, push notifications, live leaderboards, and social sharing. Users can track their friends and family members who are participating in the event or keep up with the event progress.

Overall, the Rock 'n' Roll Marathon Series app is a great tool for runners who want to stay informed and connected during the event. Whether you are a seasoned marathon runner or a beginner, this app will keep you moving for miles and bring fun to the run.