The “OnCall” app is designed to connect the public to licensed doctors, physician assistants, and nurses. The public can conveniently use the app to receive personalized advice from trustworthy healthcare professionals at low costs. This app will bring benefits to those who would like easier and more affordable access to reliable medical information that is tailored to each patient’s specific needs, as acquired and considered carefully by the physician via phone call. This could also potentially make treating health problems more expedient for those who are not well-insured. Furthermore, physicians willing to create an account on this app will have the incentive of earning extra money on the side.