A Review of Wrist-Worn Wearable: Sensors, Models, and Challenges

Table 8

Commercial WWDs used a barometer (baro), thermometer (thermo), gyroscope (gyro), accelerometer (accel), magnetometer (magnet), pedometer (pedo), and altimeter (alti).

Name	Picture	Price $ (name of the resource website of price)	For affect/activity recognition	Sensors
Shimmer IMU; http://www.shimmersensing.com/products/shimmer3-development-kit		444 shimmer	Activity	ACCEL, GYRO, MAGNET, AND ALTI,
Samsung Gear S		219 Amazon	Activity	ACCEL, GYRO, PROXIMITY, COMPASS, HR, BARO, UV LIGHT; S3: ACCEL, GYRO, HR, BARO
Motorola Moto 360 2gen; Motorola Moto 360 sport		99; 125; 193; Amazon	Activity	ACCEL, GYRO, HR; SPORT: ACCEL, ALTI, GYRO, HR, AMBIENT LIGHT SENSOR
SKT smartband	NA	50–53	Activity	ACCEL, LED MATRIX, VIBRATION MOTOR, CORTEX M3 (ARM CPU, ACTIVITY TRACKING ALGORITHM)
Xiaomi MI band		23–32; Amazon; not ship to SA	Activity	HR, PEDO, SLEEP MANAGEMENT; SMS REPLY, ANTI-LOSS, RIGOROUS TEST FUNCTION.
SparkFun 9DoF Razor IMU		49.95	Activity	ACCEL, GYRO AND MAGNET
Samsung Gear Live Smartwatch; https://www.samsung.com/us/support/gear/gear-live-support/; https://www.gsmarena.com/samsung_gear_live-7714.php		269.99; eBay	Activity + affect	ACCEL, GYRO, HR, COMPASS
LG G Watch R Smart		153.59; Amazon	Activity	ACCEL, GYRO, PROXIMITY, HR, BARO
Pebble Watch Black; Pebble 2 + Heart Rate Smart Watch -		39; −89.95; Amazon	Activity + affect	MICROPHONE; ACCEL, GYRO, MAGNET; AMBIENT LIGHT SENSOR COMPASS