The Apple Watch Series 4 is the biggest upgrade to the Apple Watch since the product launched back in the spring of 2015. New features include an all new design, stainless steel gold color, faster internals, brand new watch faces, and more.

The new hardware features a much larger screen with reduced bezels in the same size watch casing. The larger screen fits a much more dense watch face that can show many more complications.
When Apple launched the Apple Watch Series 4, American Heart Association president Dr. Ivor Benjamin said that he was inspired by ‘the life-saving potential’ of the device. A paramedic has now chimed in with a detailed look at ‘how the Apple Watch Series 4 will and won’t save lives
