I have been trying to change the square footage of my zones. When I enter the number and tap on the circled check mark, a box pops up that says the value must be greater than zero and less than 10,000. I tap on OK and the numeric keyboard pops up again. Endless cycle.
Attached is a sample screenshot. 500 sq ft surely meets that requirement. There is no other option to Save.
I'm running iOS 9.3.2 and Rachio app 2.6.1 downloaded yesterday. My unit is the 8 zone Gen 2.