Total power usage?

Is there an app which will add up the total wattage of all my SmartThings SmartPlugs?

I have about 10 of the plugs now and all running various devices, would like to add them all up into a single tile on ActionTiles so I can see what the house is using. I know I could get one of the devices which goes into the main fuse board (and thats next) but this would be good for a breakdown/comparison.