Responder Express (REX) is an availability, mapping and respondent tracking system for Fire & Emergency Services in Australia. REX saves lives by providing real-time data on availability, and qualifications of responders in the system.

REX tracks responders from the minute they start to the time the incident is closed, both manually or automatically. It also provides SOS functionality for active responders to detect accidents. The system is a reliable and robust solution that has the capability to support thousands of firefighters and roster more than 50 per incidence in real-time, without causing delays or bottlenecks in operation.