Availability Messaging System (AMS) is a free app developed by the New Zealand Fire Services Commission for use by members of Fire and Emergency New Zealand. The app provides real-time information about the availability of volunteers to respond to fires and emergencies. It also helps in identifying who is responding to a request to attend an incident, ensuring that the right people are in the right place at the right time.

AMS is equipped with features such as automatic mapping of incident location, in-brigade messaging functionality, and the ability to schedule availability. The app also allows users to indicate their response to an incident, so their brigade members know who is responding and how far away they are.

AMS provides threshold alerts for both brigades and incidents, ensuring that the right number of people are available to respond to an emergency. Overall, AMS is a reliable and efficient tool for firefighters to communicate and coordinate during emergencies.