Thanks for posting TASHBAUGH49! The newest version of firmware that is coming soon will have an update that shows when Rain Sensors are active in the app. If you want us to upgrade you now, just send us your MAC ID:)
The rain sensor will prevent the timer from running a program, but the server will take that into account the next time that it waters. It will still look at weather history and update based off of the amount of rainfall the area received.
There is no way to tell it how long to stay on a delay, but smart watering will monitor all of this and water when the soil moisture amount gets too low.
Hope that helps!