The increase in city populations and the rise in requests about healthcare services created a new area called Smart Healthcare applications. Most of the smart healthcare implementations are used in systems and their components concerning remote control of chronic illnesses. Currently, hospital and doctor visits take a big part in healthcare services for chronic patients. It can be predicted that remote health checks will be easily done for those patients in the near future. In our work, we have developed a decision support system that can be used in remote-monitoring the oxygen saturation and pulse rate values of a patient. In this system, an Android smart phone, a portable and wearable pulse oximeter, an Android Studio 2.2.2 version mobile software development kit have been used. Furthermore, the designed system contains android mobile application, Microsoft SQL database and Microsoft Visual Studio programs. The web interface created with Microsoft Visual Studio is used in real-time transmission of oxygen saturation and pulse rate values to a central patient control system where instantaneous saving of values to the Microsoft SQL database is performed. The system designed in this work has an important potential for smart healthcare applications that will be used in remote control of chronic illnesses.