Turn a guest list into a clear seating plan and a vendor-ready execution packet—without an account or subscription. Import a UTF-8 CSV from Files or add guests manually. Build your room with round and rectangular tables, set together, separate, or preferred-table rules, run deterministic auto-seating, then drag and refine the result on iPhone or iPad. TableMosaic explains remaining conflicts instead of hiding them. Save named snapshots, compare assignment changes, and export a printable PDF packet plus CSV assignments for vendors. The PDF includes a room map, table lists, meal-choice totals, and place cards. Your original plan stays editable, so last-minute changes do not require rebuilding a spreadsheet from scratch. Everything stays on your device. There is no account, advertising, analytics, tracking, cloud sync, or external service. TableMosaic is a paid download with the complete feature set included.