Embodiments of systems and methods are provided to monitor user presence, and manage various actions in response to user presence, within a system comprising multiple UPD-capable devices. In some embodiments, the systems and methods disclosed herein may collect user presence data from a plurality of UPD-capable devices, monitor the user presence data collected from the plurality of UPD-capable devices to accurately identify a user's presence, attention and/or engagement with a particular UPD-capable device, and manage various actions performed within the particular UPD-capable device based on said monitoring. In doing so, the systems and methods disclosed herein may reduce or eliminate problems that may otherwise occur when multiple UPD-capable devices are used within a system to monitor user presence.