CARNEO Fit + APP is a smart wristband and smart watch application that connects to your phone via Bluetooth. The application has two modes, which you can switch between by simply pressing a button. In the first mode, it can send notifications, SMS messages, and phone calls to your phone. It also has a calendar function for women who are looking to get pregnant. In the second mode, it can measure and track various physical data, such as heart rate, body temperature, blood oxygen saturation, sleep quality, and so on. It also has a history of measured data that is always available to you.