Sense Home Energy Monitor. I’ve tested several energy monitors including Curb and eGauge 3000. This is by far my favorite. Very fast hookup, 15-30 minutes. The best app I’ve seen. Watch hourly/daily/weekly/monthly usage and watch moment to moment usage. Great for finding energy hogs and figuring out how much power various appliances use. The appliance recognition is pretty good, but sometimes spotty. It confuses my coffee maker and my dishwasher, for instance. That said, if you’re on the market for an energy monitor, this is the one to get.