I hate myself for clicking on this thread, then more hate after reading the OP's posts defending his angle. It's not free, that's why people are unhappy with your thread. Change the thread subject to Wireless Electricity Monitoring and the flaming will go away.
Well... almost. You can literally go read your meter and find out how much power you're consuming with a little bit of 3rd grade math. For $200 you get to see how much power you're using on your phone or computer in real time. Eh... I'm ok with the old fashion way of reading my power consumption from an electricity bill.
