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A smartwatch that measures the user's ability to convert body heat to electric power using a thermoelectric element and solar cell; smartwatch and wearable activity tracker that measures the user's activity, steps taken, and sleep patterns and features a heart rate sensor, gps locations tracking, a lcd color display, power meter, and wireless communication channel; downloadable mobile app that communicates with the user's smartwatch and wearable activity tracker to record and display data regarding the user's activity, steps taken, sleep patterns, heart rate, and location; smartwatch and wearable activity tracker that is powered by the user's body heat using thermoelectric technology and by light using solar cells; downloadable mobile app that communicates with the user's smartwatch and wearable activity tracker to record and display the user's electrical power generation; smartwatches; wearable activity trackers; downloadable mobile applications; smartwatches that measure the user's ability to convert body heat to electric power using a thermoelectric element and solar cell; smartwatches and wearable activity trackers that measure the user's activity, steps taken, and sleep patterns and feature a heart rate sensor, GPS location tracking, an LCD color display, power meter, and wireless communication channel; smartwatches and wearable activity trackers that are powered by the user's body heat using thermoelectric technology and by light using solar cells; downloadable mobile applications that communicate with the user's smartwatch and/or wearable activity tracker to record and display data regarding the user's activity, steps taken, sleep patterns, heart rate, and location; downloadable mobile applications that communicate with the user's smartwatch and/or wearable activity tracker to record and display the user's electrical power generation