While early models could perform basic tasks, such as calculations, language translations, and game-playing, since the 2010s smartwatches are effectively wearable computers. Many run mobile apps, using a mobile operating system. Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth or USB headset.
Nowadays a smartwatch is a modern watch that provides a touchscreen interface for daily use. With a smartwatch, people can track heart rate, SPO2, blood pressure, sleep, step count, etc. Bluetooth calling smartwatches are helping people to connect to each other through the smartphone.