Hi I have been going through anxiety alive applications for when an exercise they all go away and I feel more confident by myself when I recently went for a run my heart palpitations went away but I still feel a little scared because I don't feel my heartbeat or supposed for your heartbeat I have no signs of heart problems no signs of any pain and I always check my heart rate on a phone using an app they always give me different numbers I just want to know if heart rate app are legit and true