Create a church app for Android, Kindle Fire, iPhone & iPad

We're a church looking to get an app developed. Features should include: 1) Admin interface (preferably from web, but not required) 2) Change graphics (logo, header, etc.) as needed 3) Usergroups for contact and discussion purposes 3b) Some groups users can add themselves to (public), others they can request to be added to but must be approved (semi-private), and others that aren't publicly viewable and they must be added to by the app and/or group admin (private) 4) Post audio (mp4 from website) and videos (streamed from YouTube, Vimeo, etc.), just YouTube if necessary. 5) Integration with our Stripe account for credit card processing, with multiple funds people can designate portions of their overall contribution to. 5b) Admin can add/remove funds as needed. 6) Post announcements and news 7) Push notifications to users, particularly important announcements, including pushing to specific groups (mentioned in #3) 8) Add/edit/remove custom pages and content (HTML-based), preferably also PHP-based (if possible), e.g. just pulling and posting to a page on our website. 9) Photo galleries (easily add new galleries, add/remove pictures and captions) 10) Events calendar for both regular (repeating) and one-off events 11) Daily inspiration; admin adds to a database and app chooses one each day; or better, it just pulls the data from a script on my site and I can handle what gets chosen, etc. 12) Casting video to media devices (e.g. Fire TV/stick, Chromecast, Roku/stick, etc.) 13) Content sharing to Facebook, Twitter, and Instagram 14) Bible integration (if possible); don't know if there are any free apps/programs/databases out there to integrate with 15) I imagine that much of this can be integrated with our website, and just pull the content from there. I can handle that side of it, so we'll need to work together to see how much I can do on my end to make it easier. If we have to roll out versions on different platforms over time, that's fine, but we'll need to go in this order: Android, iPhone, Kindle Fire, iPad (if it's different programming than the iPhone)