Apple Watch. Your handy health companion, is even more powerful. As well as all the great Apple Watch wellbeing features, Apple have added temperature sensing for deeper insights, and Crash Detection should you ever need help in an emergency*. Sleep stages let you understand your sleep even better, and you can stay fit in new ways with the enhanced Workout app. It automatically detects when you start a work-out, and can monitor blood oxygen, heart rate, sleep, and more, to guide you towards the healthiest you.