mobile app for classroom registration which then populates on a roster, completion forms and certificates

I am looking to develop a mobile app for classroom registration which will populate on a roster, completion forms, and certificates. The features I am looking to include are registration, roster, completion forms, and certificates. The specific platform I am looking for is iOS, and I have specific design preferences. I am looking for a team to help me with the development of this app, from conception to completion. The design should reflect the functionality of the product, and the team should possess the necessary skills to create an app that is efficient, intuitive, visually appealing, and user-friendly.