Intelligent sensor meant to be placed between the shoulder blades, able to recognize incorrect postures of the body and stimulate the user to correct them. The sensor, incorporated in a light and thin hexagonal plates, is maintained at the height of the shoulder blades by straps that go around the shoulders. When the user takes a wrong position, it creates an excessive tension that is immediately registered by the sensor. In this case a feedback will be sent on the user's smartphone, so he can correct his posture and avoid health problems. The straps can be adjusted with ease and the sensor, equipped with rechargeable batteries, is designed to be used by all users.