It logs the data. If I can get the wireless module to link up with my network (it requires a WPS button on the router) then I can monitor all of the charges on my computer! :-)
Here's some readable shots just after I plugged it in tonight, taken with my dSLR instead of my phone:
That's the wireless antenna across the circuit board. I need to enter in my actual cost per kWh; which is 18.6¢ at the moment.
Tomorrow I can post the first full charge with a Level 2 EVSE. (EVSE stands for Electric Vehicle Supply Equipment, by the way - lame-o acronym if you ask me.)