What this product is
Apple Watch Series 11 is a device sold by Apple.
From the maker's page. See the maker's page ↗ We don't repeat the maker's health claims.
What it measures
Reviewers say it tracks sleep stages, a sleep score, resting heart rate, respiratory rate, wrist temperature, blood oxygen and sleep duration. womanandhome.com ↗
How well it works in independent tests
In one reviewer's six test runs, average heart rate differed from a chest belt by 0.91%, and distance by 1.09%. expertreviews.co.uk ↗
Subscription
Apple says its Fitness+ service needs a subscription; no subscription is described as required for basic watch features. apple.com ↗
Battery life
One reviewer says battery lasts 24 hours normally, or 38 hours in Low Power Mode. womanandhome.com ↗
What the maker offers
It comes in 42mm and 46mm sizes, in aluminium or titanium, with a cellular option. expertreviews.co.uk ↗
Each line rests on a passage quoted word for word from the linked page (hover the link to see it). Accuracy comes only from pages independent of the maker.
About this kind of device
Fitness trackers: watches, bands and rings
Smartwatches and fitness trackers are wrist-worn monitors that people commonly use to count their steps each day.
Main risk: The pages stress that wrist-worn monitors may not count steps as accurately as hip-worn pedometers.
Research stage 2: small studies in people. What it measures and the research →
This is research on this kind of device in general, not proof that this model is accurate or right for you.
Outside reviews
No independent reviews of this product found yet.
This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.