Meet the WiTenergy: a Bluetooth smart energy meter that lets you measure your energy usage and control your appliances. It is compatible with iOS and Android devices. The WiTenergy E100S has a programmable timer, manual on/off button, and an overload alert feature.
The WiTenergy measures voltage, current, wattage, and more. It helps you save energy in the long run. Sets you back under $180 at this time.