I think most of the users doesn’t care the accuracy of water usage by gallon. It shows the trend how much I uses the water. And to calculate this, it is not that difficult if you already know ‘pr’ and ‘area’ (area * pr * minutes then unit conversion). Isn’t it true? I will do it for you:
usage(gal) = 7.48052(gal/cuft) * area(sqft) * pr (in/hr) / 12(in) * minutes/60(min)
I think Rachio supposed to have margin of ‘pr’ and ‘area’ since it can have error by measuring the catch cup or measuring the area with ruler. Then will you guys also remove the feature of ‘pr’ or ‘area’ field since it cannot be accurate? That doesn’t make sense to me…