This is the fourth generation of the amazing and innovation of the Apple Watch series of smartwatches. This was first shown at an Event that was held by Apple in 2018. This was held at the Steve Jobs Theater at Cupertino California. It is somewhat different to the other versions as it has a larger display with thinner bezels and a rounded corner. There are other design changes such as a thinner chassis with an improved ceramic back, a new 64-bit dual core processor that will improve the performance over the S3. Other services include customizations of the watch face and electrical heart sensors. The heart sensor has received approval from the FDA and has support from the American Heart Association (AHA). The device can also detect if the user falls and contact emergency services if you do not intervene before the notification connects. This is one of the many features on the Apple Watch Series 4 along with many others that will be explored in this book.