Mortgage Payment Pro 4 (MPP4) 

This will be mind blowing as you see the functionality of this powerful calculator.  Award-winning for it's PMI calculations regarding credit score to down payment.   Also, has a document scanner that can upload documents to us to keep the transaction moving smooth. Describes, the conventional, FHA, R/D, VA, and the new "Doctors Advantage loan."

A priceless tool to have during any Real Estate transaction.