![Apple Watch Series 9 [GPS 45mm] Smartwatch with Midnight Aluminum Case with Midnight Sport Band M/L. Fitness Tracker, ECG Apps, Always-On Retina Display, Water Resistant Midnight Aluminum Case with Midnight Sport Band 45mm Case M/L - fits 160–210mm wrists](https://i.shopsavvy.com/https://x.shopsavvy.com/https://m.media-amazon.com/images/I/71OSc6IfGcL._AC_UY218_.jpg)
Yep, the Apple Watch Series 9 can track your sleep automatically. Apple rolled out sleep tracking with watchOS 7, and the Series 9 keeps that going.
So, you just wear your watch to bed, and it takes care of the rest. It'll keep track of your time in bed and your sleep, then share those insights through the Health app on your iPhone.
While it doesn't have Blood Oxygen (SpO2) monitoring, which some folks might miss for deeper health insights, it does offer ECG capabilities. This lets you take an electrocardiogram right from your wrist, which can be helpful if you're keeping tabs on your heart health, particularly for things like atrial fibrillation.
Our research shows that people find this feature really useful for their regular health checks.
There's a bunch of fitness features too, with a ton of workout options and performance stats that fitness buffs will appreciate. It's also got handy extras like fall and crash detection, so you can feel a little more at ease during your workouts.
Plus, it's easy to read even in bright sunlight, which is great for when you're out and about.
The Series 9 also keeps you connected with notifications for calls, messages, and apps directly on your wrist. It's a handy little companion, not just for health but for everyday life too.
So, if you're into Apple and want automatic sleep tracking along with other cool health and fitness features, the Series 9 is a solid choice without needing a lot of setup beforehand.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from 2 retailers in ShopSavvy's price data, most recently seen Aug 15, 2025.
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More Answers
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