Put simply, the Home app provides basic functionality for the camera as well as motion detection notifications, and also allows the 180 Cam HD to interact with other HomeKit enabled devices. The Omna app provides additional functionality including local recording and playback, adjustment of motion detection settings, and firmware upgrades. We would recommend that you use both the Omna and Home apps concurrently in order to get the greatest benefit from all of the great features offered by the 180 Cam HD. A comparison of the features supported by each app can be found in the below table: