Apple Watch SE 3 is packed with essentials like sleep score, Always On display, Activity rings and more. All at a great price. Apple Watch SE 3 is packed with health, fitness, connectivity and safety essentials — all at a great price. Track your sleep score. Get richer health insights in the Vitals app. Stay active with a wide range of workouts. Save time with fast charging. See your info at a glance with the Always-On display. And still get all-day, 18-hour battery life.