If I tap the icon to the left of the remote button (the list view button?) it also immediately crashes.
As a brand new user of Rachio prodcucts (based on their appearance during the HomeKit presentation @ WWDC and support for sprinklers) I just installed the app for the first time yesterday. So, I can’t say if it would have worked previously. I did reinstall the app and restart the iPhone 7 Plus. Same issue on an iPad running the iOS public beta. (What’s up with a no native resolution iPad app requiring the app to be 2x scaled and cropped?)