A:Answer Aloha MJinOakton, thanks for taking the opportunity to ask us your question about the Samsung Galaxy Watch8. No, you do not need to carry your phone into the pool area or gym to track your workouts with the Samsung Galaxy Watch8 (SM-L320NZSAXAA).The watch will store your swimming or gym workout data locally and automatically sync it with the Samsung Health app on your phone later once they are connected again. If you have any other questions, please feel free to contact Support. Thanks for being a faithful Samsung customer. - Debra