Some smart homes fail at the most basic of tasks, and that might be because your setup relies entirely on sluggish smartphone GPS geofencing. When you rely on the Home a**istant companion app or native platform geofences to track home vs. away states, you a**ume your phone GPS is enough to run an automated household. While your phone GPS is designed for navigating highways, it’s not built to manage your doorstep. It suffers from massive latency, battery-draining polling intervals, and dead zones that leave you standing in the dark.