apple watch
is my apple watch series three safe to swim in the pool in?
Yes. See here: About Apple Watch water resistance - Apple Support
Can I go swimming or take a shower with my Apple Watch?
Apple Watch Series 1 and Apple Watch (1st generation) are splash and water resistant, but submerging Apple Watch Series 1 and Apple Watch (1st generation) isn't recommended.
Apple Watch Series 2, Apple Watch Series 3, and Apple Watch Series 4 may be used for shallow water activities like swimming in a pool or ocean. However, Apple Watch Series 2, Apple Watch Series 3, and Apple Watch Series 4 shouldn't be used for scuba diving, water skiing, or other activities involving high velocity water or submersion below shallow depth.