The document describes a mobile app that allows users to either be a "quitter" trying to quit smoking or a "supporter" helping others quit. As a quitter, users can invite friends and family for support, receive messages of support, and purchase nicotine gum or e-cigarettes. As a supporter, users can invite quitters, send pre-written or customized messages of support, and gift nicotine products to the quitters. The app allows users to easily switch between the quitter and supporter modes.