I am about to buy a Clarity. I live in a condo and have nowhere to plug it in except in my bay of a communal garage. The electricity in the garage is paid for by the Condo association, not by me, but I have to reimburse them for it. I currently have a 2012 plugin Prius and I have a little Kill-a-watt type meter between the outlet and the charging cord. Each quarter, I read the meter and send the association a check for the number of KWH used based on their cost per KWH. Does the Clarity have a built-in or phone app to measure usage or do I have to continue to use my little meter?