DoubleMap Bus Tracker is an iPhone app that allows users to track the exact location of a bus in real-time. With this app, riders don't need to wait at the bus stop anymore, as they can view bus locations and get ETA predictions for the stops they use.

The app is easy to use, and users can choose the routes they want to see and stay updated on the latest changes in their system. Additionally, if your transit system is not available in the app, you can request it, and let them know that you want DoubleMap.

Overall, DoubleMap Bus Tracker is a useful and convenient app for anyone who relies on public transportation. It provides accurate and up-to-date information that can help users plan their trips more efficiently.