Apple Watch Series 8 45mm features advanced health sensors and apps, so you can take an ECG,¹ measure heart rate and blood oxygen,² and track temperature changes³ for advanced insights into your menstrual cycle.⁴ And with Crash Detection, sleep stages tracking, and advanced workout metrics, it helps you stay active, healthy, safe, and connected.

*Apple Watch Series 8 45mm requires an iPhone 8 or later with iOS 16 or later.

Discover the all-new Apple Watch Series 8 45mm available from T-Mobile. Explore the features, specs, reviews, and find the available case and band colors for sale today. Get your new Apple Watch Series 8 45mm on T-Mobile’s nationwide 4G LTE network.

Need help with choosing which Apple Watch is right for you? Check out our Apple Watch comparison chart to help you decide based on the features and options of each smartwatch side-by-side.

Apple Watch Series 8 45mm Quick Facts

When was the Apple Watch Series 8 45mm released? The Apple Watch Series 8 45mm was released September 16th, 2022.

What colors are available for the 45mm Apple Watch Series 8? The Apple Watch Series 8 45mm is available in multiple colors: Scroll to the top of this page to explore colors currently in stock.

¹The ECG app and irregular rhythm notification require the latest versions of watchOS and iOS and are not intended for use by people under 22 years old. The ECG app is available on Apple Watch Series 4 or later (not including Apple Watch SE). The irregular rhythm notification is not designed for people who have been previously diagnosed with Afib.
²Blood Oxygen app measurements are not intended for medical use, including self-diagnosis or consultation with a doctor, and are only designed for general fitness and wellness purposes.
³The temperature sensing feature is not a medical device and is not intended for use in medical diagnosis, treatment, or for any other medical purpose.