http://iscoresports.com/

The app should have one rebound button. After the offense shoots and misses, and a defensive player gets the rebound, the app should know its a defensive rebound. Conversely, a rebound by a player on the offensive team should default to offensive. I have seen this function on other apps.

If you score in "Game Mode", that is how things work. In "Coach Mode", things are intentionally more flexible where you can enter offensive or defensive rebounds without first being forced to enter a shot.