For smart phones, wearables, and other location-aware devices. SkyShepherd allows complex "safe containment areas" with progressive alert zones to be created and assigned to other connected devices. The client autonomously monitors its connected device in the safe area and sends users alerts if the device is about to leave it. This passive alerting lets users act if needed, without having to constantly check on the device just to see if it’s OK! This saves significantly on battery and data consumption, and is also more secure.