There are two different ways of looking at the current status for sensors with the Frontpoint App:
For Android and iOS Users:
From the home screen, tap on the down arrow at the bottom of the Security System section. This will display the Active Sensors section. This section displays just the currently active sensors (doors that are open, motion sensors that have recently seen motion).
From the home screen, tap on the right arrow at the top-right of the Security System section_._ The full security sensor list will be at the bottom of this page. This will show all of the current statuses for all of the security sensors.