Appointment Reminder System (ARS) is an SMS solution designed and built with the concept of sending SMS to customers prior to their appointment date to remind them of the appointment. Having this solution assists institutions and organizations to improve customer service level and to reduce missed appointment cases (whereby customers forgot about the appointment date) that will affect the overall performance of the institutions and organizations. ARS is a modular software whereby it is easily integrated into the clients existing Appontment System. Being a robust and scalable solution, ARS is suitable for all sectors who wants to improve their performance and customer service level.