The Apple Watch Series 7 offers the best combination of style, message handling, activity tracking, app selection, and battery life of any smartwatch for any platform. It comes in two body sizes—41 mm and 45 mm—that offer more active screen area than on previous Apple Watches in similarly sized bodies. It’s a little faster at running apps than the Apple Watch SE, and noticeably faster than the still-available Apple Watch Series 3. And it includes more premium features than previous models, such as an always-on display, blood oxygen measurement, ECG, more crack-resistant glass, and faster charging. It’s also available in more expensive steel and titanium casings.
The Apple Watch SE looks nearly identical to the Apple Watch Series 7 (unless you choose a different case color or material). Its slightly smaller screen doesn’t stay on when you put your wrist down, and it lacks the blood oxygen monitor and ECG. Otherwise, it does all the same Apple Watch-y things and costs at least 30% less, depending on your configuration, making it a great choice for someone on a tighter budget.