The Knot Wedding Websites
7.9#3 in wedding website buildersFrom $19.99 a yearFree planAndroidiOSWeb
VisitIt suits couples preparing for a wedding who want to share event and travel details, collect RSVPs, and link registries in one place. Mobile app editing is available for people who want to manage website content there.
You want what its maker publishes above — check its page for the details.