Where the practice meets the product
My Joyfullday is where the practice happens rather than something that happens to you. The Lindqvist family wedding, invited through four different WhatsApp chats, still produced one guest list, because every chat carried the same single link and every reply landed on the same page. Before the day, the list separates the answered from the missing, and reminders go to the missing names. On the day, a QR check-in at the door marks arrivals against the same record, so tracking runs from first invitation to last guest coat.
Be clear about what this does not claim. There is no open or click tracking on the message you sent, and no bot reading group history to mine for maybes. Tracking works because answers arrive in one place by design, not because your chats were surveilled.