Mobile App for Christian Outreach Ministry

We are looking for a talented developer to help create a mobile application for our Christian outreach ministry. Since we have a sizable presence on both iOS and Android platforms, the mobile app should be built for both. We have a rough idea of what features would best serve our ministry but we are open to suggestions. The essential features for the app should include messaging, calendar, event reminders, as well as a place to submit prayer requests. Although we only have a few existing design assets or branding guidelines set up, we are open to having the developer help out in that area if the individual feels they are able to do so. The end goal of the project is to make a mobile app that links the members of our ministry directly to the work of our ministry to further our outreach efforts.