DeviceMonitor Free

DeviceMonitor allows you to conveniently monitor the state of devices in your Control4 home automation system via widgets placed on your home screen. You can also send voice commands to device widgets that you are currently monitoring.

This app requires you to have access to a Control4 System in order to be used.
DeviceMonitor Free allows you to add LIGHT devices only. The paid version has no restriction on device type.

User Guide: https://www.dropbox.com/s/waqlbyypnlbw16h/Device%20Monitor%20setup%20instructions.pdf