We all know that devices such as the smartphone are seeing more and more features crammed within, which makes for them to get all the more indispensable. However, should we be concerned at how devices keep track of our details, including our heart rate, blood pressure, as well as blood glucose levels? Doctors have weighed in on the Apple HealthKit that is touted to roll out alongside iOS 8 in the upcoming iPhone 6, and here are some of their thoughts.