Major technology makers such as Apple and Samsung, traditional watchmakers such as Tag Heuer and Fossil, as well as several independent companies such as Peeble, have focused on smartwatch in recent years.
While features and functions may vary, the key task of a smart watch is to display useful information from the smartphone on its screen (SMS, alerts, etc.) - and not only. Some smartwatches can operate autonomously, but most are designed to work with a smartphone. At the same time, there are some models that have built-in "health-fitness" functions, such as a pedometer or a heart rate monitor.