Which New Apple Watch Is Right for You? Here’s Everything to Know About the Ultra 4 vs. Series 12

Addison Aloian / WH IllustrationPriceFrom $799Sizes49mmColorsBlack or natural finishBatteryUp to 50 hours of normal use or 84 hours in low power modeHealth and Fitness FeaturesReadiness score, health age, cycle tracking, heart rate tracking, irregular rhythm notifications, medications app, mindfulness app, noise app, sleep stages, sleep score, sleep apnea notificationsPriceFrom $399Sizes42mm, 46mmColorsAluminum (dark bronze, light gold, black, space gray), titanium (radiant gold, natural), or ceramic (pearl white, night blue)BatteryUp to 24 hours of everyday battery life and 15 minutes gives you up to 12 hours of additional battery lifeHealth and Fitness FeaturesReadiness score, health age, cycle tracking, heart rate tracking, irregular rhythm notifications, medications app, mindfulness app, noise app, sleep stages, sleep score, sleep apnea notifications Addison Aloian is the associate health & fitness editor at Women’s Health, where she writes and edits across the health, weight loss, and fitness verticals. She’s also a certified personal trainer through the National Academy of Sports Medicine (NASM). In her free time, you can find her lifting weights at the gym, running on the West Side Highway in New York City—she recently completed her first marathon, the 2025 New York City Marathon—and watching (and critiquing!) the latest movies that have garnered Oscars buzz. In addition to Women's Health, she’s made an appearance on the Oprah Podcast and her work has also appeared in Allure, StyleCaster, L'Officiel USA, V Magazine, VMAN, and more.