All-Day Assistant helps you stay connected. Send messages make calls and get meeting invitations-no phone required. Siri is faster and smarter and now speaks from your watch. Stay in touch while you work out and keep track of your fitness goals with the Workout App. See how far and high you go with GPS and altimeter or track your laps in the pool with its swim-proof design. Make closing all three Activity rings your goal each day with a little nudge from the Smart Coach when you need it. Share your achievements with friends and family to stay motivated. The Health App is the one app for all your health and fitness data. Keep tabs on your resting walking and workout recovery heart rate or relax your body with the Breathe App. Apple Watch Series 3 has a water resistance rating of 50 meters under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. However Apple Watch Series 3 should not be used for scuba diving water skiing or other activities involving high-velocity water or submersion below shallow depth. Apple Watch Series 3 (GPS + Cellular) requires an iPhone 6 or later with iOS 11 or later.