A wearable computer that closely resembles a wristwatch or other timepiece is called a smartwatch. Many smartwatches are Bluetooth-capable and can tell the time. The watch transforms into a wireless adapter that may bring the features of the wearer's smartphone to the timepiece. Today's smartwatches have a built-in touchscreen for daily use, and an app on a smartphone is used for management and telemetry functions including long-term biomonitoring.