Need and Apple Iphone App Developed

I want you to develop an Iphone app that will allow the user to enter a phone number into a database so that the next time that person calls it will block the call from coming through and or just dump or end the call. I want to be able to add PRIVATE, 800, 877, 876 and UNKNOWN numbers to this also. Maybe a feature to add the last call into this database. This should be an easy to use app for the user. This bid will include the entire package - Artwork, Database ect.