Apple usually releases most of its updates at the same time. They just released Watch OS 6.1 which adds a few new features and has the usual bug fixes. Apple has made this update compatible with older series Watches even though some of the features are not available to really old models. If you are an Apple Watch person, the update looks pretty good, although I do not have an Apple Watch so I cannot advise you from experience. This article covers some of the improvements.