What is the best alternative to Paperless Post: Invitations on iPhone?

Eventbrite Organizer, S tier, #1 in guest list management.

Is there a free alternative to Paperless Post: Invitations?

Yes: Eventbrite Organizer (S tier, #1) is free, with no in-app purchases.

Yes. 1 app ranks above it in guest list management: Eventbrite Organizer (#1).

Paperless Post: Invitations is S tier, #2 of 8 in guest list management. Here is everything that competes with it on iPhone, in tier order.

1
Eventbrite OrganizerS
Free · ★ 4.8 · 32,657 ratings · score 94
Mobile app for organizers to track ticket sales, check in attendees, monitor attendance, and manage orders.
3
Joy Wedding Planner & WebsiteS
Free · ★ 4.8 · 8,720 ratings · score 91
Wedding planning app for managing a wedding website, guest list, RSVPs, invitations, registry and guest accommodations.
4
Doorlist - Events & InvitesA
Free download · ★ 4.8 · 2,968 ratings · score 89
Creates event pages with guest lists, RSVPs, and QR code check-ins for hosting and attending events.
5
The Knot: Wedding Planner AppA
Free · ★ 4.9 · 222,635 ratings · score 88
Free wedding planner app for registries, guest lists and RSVPs, vendor search, invitations, seating charts and budgets.
6
Events: Zazzle Digital InvitesA
Free + IAP · ★ 4.8 · 102,975 ratings · score 84
Design video or photo event invitations, send them by text, email or social media, and manage RSVPs, updates and guest.
7
Zola - Wedding PlannerB
Free + IAP · ★ 4.9 · 98,406 ratings · score 78
Wedding planning app with vendor suggestions, websites, invitations, a registry, RSVP tracking, a budget tracker, a…
8
Evite: Party Invitation MakerB
Free + IAP · ★ 4.8 · 516,580 ratings · score 74
Creates digital party invitations and save-the-dates, sends them by email or text, and tracks RSVPs.

What is the best alternative to Paperless Post: Invitations on iPhone?: Eventbrite Organizer, S tier, #1 in guest list management.
Is there a free alternative to Paperless Post: Invitations?: Yes: Eventbrite Organizer (S tier, #1) is free, with no in-app purchases.
Does anything rank above Paperless Post: Invitations?: Yes. 1 app ranks above it in guest list management: Eventbrite Organizer (#1).