Reunier is a coordination app for private groups planning in person events. It provides rooms where members can share event details and respond to invitations. The app is designed to help groups organize plans without requiring members to open a room to submit a response. Users can create an event by entering its details or describing it by voice in English or Spanish. Reunier generates a draft for review before the event is created. Event details can include start and end times, and participants can respond to the invitation. The website describes the service as having no subscriptions. Users can sign in with Google or Apple. The service requires users to be at least 18 and to accept its Terms of Service and Privacy Policy.