Plan the whole wedding in one place: budget, vendors, guests, seating and your checklist. The Wedding Planner App is a simple app that opens in your browser. Set your date and total budget, and it splits the budget by category, tracks every deposit, counts your RSVPs and lets you lay out your reception room and drag your guests onto the seats. What it does Wedding budget: 15 categories with a suggested split (venue 20%, catering & bar 25%, photography 10%…). Change any %, and each category shows estimated, booked, paid, still to pay and left to book. Over budget turns red. Vendors and payments: contract total, deposit, deposit due date and final payment due date for every vendor. Log payments in one click; the app shows what's due next and flags anything overdue. Guest list: side, group, party size, RSVP, meal choice, dietary needs, gift and thank-you note. Paste a whole list at once. Counts of attending, waiting to hear and declined, plus meal totals for the caterer. New: families and groups: add a whole family at once ("The Smith family", "College friends"), or paste a list with a group column. Drag the group onto a table and everyone sits side by side; move or unseat the whole group in one go. If they don't fit, the app offers to seat the ones who fit or pick another table. New: keep apart: mark people (or whole families) who shouldn't share a table. You get a warning before you drop them together, a red flag on the floor plan ("Alex and Jordan are at Table 4 — marked keep apart"), and the notes in the CSV and printout. Keep together works too. New: auto-seat: one click fills your tables: families side by side, keep-apart rules respected, each side together where there's room, no table over capacity. It tells you who couldn't be seated and why, and Undo puts everything back. Then adjust by hand. Floor plan of your reception room: type the room size in feet, then drag and turn round, rectangle, banquet and head tables, a sweetheart table, the dance floor, stage or DJ, buffet, bar, cake table, entrance and restrooms. Duplicate, rename, snap to the grid, zoom in and out. Drag-and-drop seating: drag names onto a seat or a table (or click a name, then a seat). Seats show initials colored by side, meal or group. Prefer a simple list? The table list view is still there. Seating checks: full and over-capacity tables, attending guests without a seat, declined guests still seated, keep-apart conflicts and dietary needs at each table. Print / PDF: the floor plan on one page and each table's guest list after it (with a legend of your groups), plus a guest list by table in CSV for the venue and caterer. Countdown checklist: 37 tasks from 12+ months out to after the wedding, each with a target date counted back from your wedding day. Overdue and this week's tasks at a glance. Home dashboard: days to go, budget booked, RSVPs, seating and the payments coming up. Light and dark mode with 4 color themes: Blush, Sage, Champagne and Navy. Good to know One file that opens in Chrome, Edge, Safari or Firefox on a computer (Windows, Mac or Chromebook). No install, no account and no subscription. Your data stays in your browser on your computer. Download a backup anytime (it includes your floor plan, groups and keep-apart rules), restore it on another computer or share it with your partner. Export budget, vendors, payments, guests and the guest list by table to CSV. Now on your phone too: open it at thelemonplans.com/app/wedding-planner/ on iPhone or Android, paste the license key from your receipt and add it to your Home Screen. It works offline. Phone and computer don't sync; move your data with a backup file. Try the free demo with sample data before you buy: open the demo. Instant download: the app file plus a quick-start PDF. Personal use only. Planning tool, not financial advice.