The iPad has nothing to do with running the clutches.  What you are talking about is a pretty tough call, since you already have a functional setup.  I've had some issues with PP products, mostly concerning reliability, and I think Ag Leader stuff may be superior in that respect.  That said, nobody runs row shutoffs better than Rowflow.  If you were interested in going full circle and running the Yield Sense monitor in your combine too, I'd give you a bigger push in that direction.  It's fantastic.