This project proposes a smart heart monitoring system that is based on the concepts of the Internet of Things (IOT) and cloud computing. The aim is to provide a convenient, easy-to-use, and cost-effective health care system to support senior citizens, athletes, and people from all walks of life enabling them to be remotely monitored and diagnosed from the comfort of their homes without having to travel to hospitals. The users’ Electrocardiogram (ECG) data is collected using a simple-to-use 3-lead sensor set and is transmitted directly to the cloud using WiFi. The proposed system is based on the Arduino WEMOS microcontroller, featuring compactness, low-power consumption, and cost effectiveness. The HTTP protocol is employed in the IoT cloud in order to provide the health-care personnel with real-time visualisations of the users’ ECG, remotely accessed from the convenience of their smart phones or computer browsers. In case of abnormal heart activities, an emergency email addressed to pre-selected contact people is one button away. The system is easily scalable, which means a doctor could hypothetically manage the health of multiple patients from his/her browser. The features of the proposed system have been successfully demonstrated in practice showing its potential contribution to a smart city environment.