Aunt Patty gets a phone call. The cousins get WhatsApp. The bridesmaids get texts. Dana lives in the Facebook group. One send from you — GroupCast fans it out, tracks who’s seen it, and follows up with the ones who haven’t. No more “did everyone see my message??”
GroupCast watches the trip’s real deadlines — block cutoffs, deposit dates, balance due, check-in windows — and runs the chase so the organizer never has to.
Voice calls use text-to-speech with a real callback number. Quiet hours respected per timezone. Unreached after 24h → automatic second channel.