What is the functionality of AppointmentPlus and how does it operate? AppointmentPlus is an online scheduling platform designed to cater to a wide range of businesses and organizations. It serves various industries, including Fortune 500 companies as well as small businesses. AppointmentPlus can be easily tailored to suit the needs of most businesses and is highly favored by colleges, fitness trainers, spas, shipping docks, government agencies, healthcare providers, financial institutions, tour operators, and many other organizations.