DC Tour Guide App Develop and Design

I'm looking for someone with proficient and applicable knowledge of various language platforms that would enable developing and designing an IPhone and iPad app (possibly also for Android but in the future). It is a very simple project, and I have the majority of the designs drawn out. Interested persons need to have a demonstrable knowledge of app creation, as well some ideas to complement the ones I already have (I'm completely open to new ideas as well). Also needs to have skills in designing graphics and possible sound. If interested, please be willing to discuss projects you've worked on before or your own creations-then we can discuss more specific details.