RouteShout  is an application that allows users to receive scheduled and predicted arrival times via SMS or mobile application. Transit agencies that wish to be included in the application can request to be added; GTFS data is required to import service and schedule data. Real-time data can be incorporated if there is an installed AVL and arrival estimate system with the necessary interface. RouteShout also offers an API interface for accessing transit data .
Basic services are provided for free to participating transit agencies. SMS services are available at an extra subscription cost to agencies. A RouteShout administration interface (also available only with paid access) allows transit agencies to push alerts to customers that sign up to receive information pertaining to particular services.