The App is quite nice, but what's annoying:
1. the App does not download the data for offline use. Should be easy doable and overwrite internal storage on new connect. Would help to look at the data when away from the camping car.
2. why don't you log more statistics? Would be great to see the sun effectiveness over the day. Would not have to be a minute based view, but maybe one value an hour or so. This detailed info would not have to be kept for a long period, lets say some days would be enough.
These two things would make it a perfect product for me.
BTW. I do use a MPPT 75/15 SmartSolar