This Year so far has been tagged as the year of "Smart wearables" - those smart watches or wrist bands that contain sensors to measure and transmit physical information like heart rate, blood pressure, body temperature. number of steps walked etc.
But the Galaxy S5 has become the first smartphone to have placed a dedicated heart rate sensor. Many observers consider this new addition as mere gimmick and not really meaningful for an average buyer. Moreover the accuracy of the measurement results is been questioned by some who have tested it.
Actually the so called Heart rate monitor on the phone is a "Pulse Oximeter" sensor package. Let's see how it works.