In the latest move by smartphone makers to make you healthier through technology, Samsung has introduced a new way for Galaxy S5 users to tell if they are stressed out. Because your actual feelings arent enough, apparently, your phone will now let you know what your stress levels are using a heart rate monitor. When your heart rate is sped up, your phone will think you are stressed out. This isnt exactly the best way to read stress, as your heart rate can increase from working out or even watching an exhilarating movie.