I'm a dad. I can tell you i wouldn't need to know anything about what you are doing to know if there aren't hundreds of customers interested and a real high quality product done and dusted and on the table then its too early to get bogged down by paperwork. you are in the r&d phase right now and that is a good thing. you are light and nimble, move fast! When you have a winner, you'll know.
do you understand how much money mother fuckers are throwing at developers?
if you learn to make a specific type of app and then try to sell it you may or may not get any business from the app store but you will have obtained the skills necessary to repeat the work for someone who has ca$h - forever in the future you will be able to provide this service. learn and build as much as humanly possible mane.