Apple Watch Series 2 with built-in GPS lets you leave your iPhone at home when you go for a run or ride — and still measure your workout accurately. You can also do swim workouts in open water, track laps at the pool, or splash with your kids. And with the brightest displays Apple has ever made, you’ll see your metrics clearly, no matter how much the sun glares. A custom sensor continuously measures your heart rate while you use the Workout app. Apple Watch Series 2 is rated water resistant 50 meters, so you can leave it on when you’re in the pool or ocean. You can also choose from 12 indoor and outdoor workouts — including swimming, biking, running, and elliptical — then set your goals and get moving. View a history of your rings on your iPhone to see your performance over time, and be inspired to pursue new goals.