The Apple Watch SE 3 starts at $249, while the Apple Watch Series 12 starts at $399. The $150 difference buys a more advanced health sensing system, a larger display, longer battery life, and more options for tracking training and recovery. The two watches still share many features, including an always-on display, wrist temperature sensing, sleep apnea notifications, retrospective ovulation estimates, 5G connectivity on cellular models, media playback, and 64GB of storage.

The Apple Watch Series 12 is now available, two years after the Series 10 introduced the current thinner design. But is it worth upgrading? While last year's Series 11 brought just four changes, the Series 12 is a much more substantial update, with a new chip, twice as much RAM, redesigned health sensors, exclusive health and audio features, tougher cover glass, 5G connectivity, and new case materials. The Series 12 starts at the same $399 price as the Series 10 did in 2024.