Customer Keyboard

I want an iPhone custom keyboard application created. What it needs to be able to do is have the customer write in their own hand written letter for each letter of the alphabet. It would show up in the keyboard an alternate keyboard that people could type their own msg with their own custom handwriting. In text mesages, emails, etc. It would send over to the receiver in their own handwriting. Payment would be paid in full at the end of the application and once accepted by the app store.