The Watch OS 5 is the fifth version of the operating system that comes on the Apple SmartWatch that is developed by Apple. It is loosely developed around the iOS operating system as it has many similar features. The original version was released in April 2015 at the same time when the Apple Watch was released. The fifth version was released to the public in September 2018 and saw the addition of more support for thirst party applications and new workouts. It also has a Walkie-Talkie feature that users will love for its convenient nature. It is a new app that allows the user to FaceTime Audio quite similar to a walkie-talkie. This book will look at many of the features of the Watch OS 5 to educate the reader as to what the OS can do.