I have looked around, but haven't seen this so here is my idea (if it is already there maybe I cant find it).
Is there a way to plug in data for the water you are using? For instance, I am using Irrigation Water (no drainage charge) and would like to keep track of not only how much water Iro has saved me but the approx amount of money it has saved (by month, year, etc).
I imagine there are a million ways to do this, but ideally I would like the option of going into the app and plugging in how many gallons I was billed and the price. Then have IRO fiqure out how much I paid per gallon and what it estimates that it saved me. I am sure most people dont want to enter this in every month, but you could also just give an option of what they pay per gallon and decide from there.