Till now, I have develop different types of iOS applications. In them I have been involved in different phases (planning, designing mockups, planning web service, designing database, developing web service, and on the end developing Android application). In your project, I can do all or part of it, depending of your needs and requirements. I will always give feedback and suggestions, which may improve jour project even more. As end product, you will receive native application which you can be published in App Store.