Apple watch series 9 is the latest version it is a most advance watch having high range of features. it has a Retina display up to 2,000 nits peak brightness.
processor : apple S9 SIP with 64 bit dual- core processor and neural engine for hihighest efficiency. in health and fitness tracking it can measure blood oxygen high low heart rate.
Apple watch series 9 is a premium smartphone . set of too many features for heath fitness and everyday use . it's great choice for iphone users.
it has water Resistance up to 50 meters allowing for swimming . it has so many features like sending message and streaming music independently.