Wedlune is a wedding-planning app designed to help couples organize their celebration together in one shared space. It brings timelines, checklists, budgets, guest details, RSVPs, vendors, and decisions into a single plan, helping couples stay informed and avoid managing everything in separate spreadsheets. Users can add wedding dates, tasks, reminders, costs, quotes, payments, vendor contacts, notes, and inspiration photos. Guests can respond through a private RSVP website without downloading the app, with tools for meals, plus-ones, and seating.

Wedlune offers a free plan with core planning features and a Premium option with higher limits and additional tools, including RSVP customization, visual seating charts, wishlist sharing, PDF exports, a photographer shot list, and AI-assisted suggestions. Couples can invite a partner with viewing or editing access, and core data remains available locally when offline, with supported changes syncing upon reconnection. The service states that planning information is account-protected and guest links are private.