Fête launched its free iOS and Android apps in September. The foundation of the app is what it calls “invitation cards.” Hosts create the card, which can include event details like time and location, or it can be used to initiate a group chat to decide where and when to hold the event. The card can be sent to anyone in the host’s contact list. Guests don’t need to have the app to participate in the chat or respond to an invitation; instead they can do it via text.