Table 7.

Different voice assistants in smart watches and their input types.

Product name	Compatibility	Connectivity	Input types (incl. sensors)
Samsung Galaxy Watch 4	Google Assistant	Wi-Fi, Bluetooth, NFC, GPS	Microphone, barometer, accelerometer, gyroscope, optical heart rate sensor, electrical heart sensor, bioelectrical impedance analysis sensor, light sensor, geomagnetic sensor, hall sensor
Apple Watch S3	Apple Siri	Wi-Fi, Bluetooth, NFC, GPS	Microphone, force touch, barometric altimeter, optical heart rate, accelerometer, gyroscope, ambient light sensors