The Knee Joint Monitor is a smart device that can measure the muscle strength and movement of the knee joint. It uses motion sensors attached to a knee band that send data via bluetooth to an Android app. The app can display and analyze the data to help the patient and the doctor monitor the recovery process after a surgery. Based on IoT, this service helps establish a spectrum of comfort for users with a medical ailment. The project aims to improve the quality of life and health outcomes for people with knee problems.