You'll find them on some Fitbit, Garmin and Withings devices as well as devices like Whoop and Oura. The latest data in town is blood oxygen – which is tracked using an SpO2 sensor. Several of the brands below (Fitbit, Garmin, Withings and Xiaomi) offer a single sleep score from their data. Many brands now distill your data down into a meaningful number, so you can see how your slumber stacks up. Looking at all this data can feel overwhelming – and when you've looked at the data for a few weeks you'd be forgiven for wondering what it all means. If you're not cycling between them – or you're missing out on some of these stages altogether – it's a smoking gun for bad sleep, and a great place to start improving. You should cycle through these sleep stages a few times per night to feel rested – and the trackers below will show this in their analysis.
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Sleep Stage are tracked by most top sleep monitors, and this means logging the amounts of light, deep and REM sleep plus any awake time – including tossing and turning. Pretty much every sleep tracker now incorporates heart rate in their sleep data.
Older fitness trackers used wrist movement to track sleep, but now it's all about heart rate monitoring – and companies like Fitbit and Withings are looking at your beats per minute (bpm) during sleep to make assumptions not only about duration, but which sleep stage you're in. The tech involved here is much more advanced than the smartphone apps that use the accelerometer to track movement under your pillow – and, as a result, things are much more accurate. Sleep tracking: Terminology explainedīefore you can pick the right sleep monitor to watch over your night, you need to know exactly what you want from one. Update: This article was updated in February 2022 to reflect the addition of the Fitbit Charge 5, Withings ScanWatch, Whoop 4.0 and Oura Ring 3. We'll be breaking down what to look for in a sleep tracker, how it manages to track your sleep accurately and the best sleep gadgets to buy – we've tested them all so you don't have to.
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There are now plenty of different ways to track sleep, whether that's through a bedside monitor, a wrist-worn wearable like a smartwatch, a device that fits under your mattress or even a ring.Īll will give slightly different insights and personalized tips on how to improve your rest time, but the options from our picks below are worth exploring if you want to know exactly how you're sleeping – and make positive steps to improve it. Wellness isn't just about doing cat yoga and drinking alt-milks, sometimes you just need a refreshing sleep to help you feel better. Good quality sleep is linked to general health, mental wellbeing and even avoiding serious long-term illnesses, so using a sleep tracker to check you're getting enough rest can be a genuine help.