You would be better of developing it yourself or visiting a local uni for students doing studies who might run it up for you for a couple hundred quid. If its just a simple app then you need to join apples developer thing to get it on there store ($99 not sure on EU price, takes aprox 3-4 weeks if accepted) Andriod is a similar thing but it was free at last check. Most Apps do not make money 90% of the apps on andriod and Apple stores have all lost money, Unless you have some insanely good idea 20% is never gonna happen. For every Angry birds theres a million failed apps that have all failed to get a user base. Good luck
