Gadgets How to

How to use Sleep Tracking on Samsung Galaxy Watch 4

smart watches 2022
Written by Gloria Towolawi

Here’s everything you need to know about taking your Samsung smartwatch to bed.

Wareable is powered by the reader. If you follow links on the site, we may earn an affiliate commission.

The Samsung Galaxy Watch 4 is an amazingly powerful wearable sleep tracker that has improved a lot since Samsung’s first smartwatch.

The Galaxy Watch 4 offers more detailed data, more metrics collected at night, and most importantly, it feels like sleep monitoring you can really rely on to tell you when you sleep.

If you’ve just bought a new Galaxy Watch and are starting to understand exactly what smartwatches are capable of when it’s time to fall asleep, we’ll walk you through the key things to know about using Samsung smartwatches to track sleep.

Before we break down what Samsung can track when you sleep, let’s first take a look at how it tracks your sleep. It does this just like most other smartwatches, using its built-in accelerometer motion sensor and its own algorithms to detect when you’ve stopped moving and closed your eyes in bed.

It will also use additional sensors such as a heart rate sensor and an SpO2 sensor to track additional biometrics. You can also use it to detect snoring while you sleep.

If you forget to track your night’s sleep, you can manually record it from the Samsung Health phone app. Just go to the Sleep tile in the app and scroll down to find the Add Sleep Recording option .

The smartwatch has a special tile (widget) for an overview of your sleep over the last night. If you want to dig deeper, you need to download the Samsung Health app on your phone, which is separate from the main Samsung Galaxy Wearable app that you’ll need to set up your Samsung smartwatch for the first time.

Much of what Samsung captures from you in your sleep is similar to what the likes of Fitbit, Garmin, Huawei, and others promise to track. Here is a short summary of what you can expect to see:

Sleep duration
calories burned
Actual sleep time
Sleep phases (awake, REM, light and deep)
Sleep stages by time
Sleep assessment
Sleep consistency
blood oxygen during sleep
Snoring Data
Some of the things above are more obvious than others, but below we’ll take a closer look at what these various pieces of data mean in terms of how to tell you your sleep times.


When you go to bed, your body and brain go through different stages of sleep, and these stages are broken down into wakefulness, REM, also known as rapid eye movements, light sleep, and deep sleep.

In the Samsung Health app, you can see a breakdown of these stages along with an explanation of what happens in these stages. Samsung will also keep a record of your usual range of sleep stages once you’ve had enough sleep to ensure it’s there.


The sleep score is an easy way to understand how well you slept. Basically, the higher the score, the better your night’s sleep is considered.

It’s based on a lot of different things. First, it is the total sleep time. Sleeping less than 7-8 hours or more than 9 hours can lead to a decrease in your sleep score.

Next come the sleep cycles. According to Samsung, most adults go through 4-5 sleep cycles per night. If you register 0-3 sleep cycles, it will lower your sleep score.

Movements and awakenings can also affect the results. If you were less restless at night, this will help you get a higher score.

Physical recovery is related to the amount of deep sleep you manage to get. So if you have a lot of time for deep sleep, that’s fine.

The last point is mental recovery, which is associated with REM sleep. This is the stage associated with memory, learning and mental health. A lower percentage of REM sleep results in a lower score, while a higher percentage results in a higher score.


Like many smartwatches and fitness trackers, Samsung’s latest smartwatch is able to monitor your blood oxygen levels while you sleep, which could be another indication of your overall well-being. You need to turn on monitoring on your watch or Samsung Health app to start tracking while you sleep.

When you turn it on, you will see a note about it in the Health app. Samsung states that blood oxygen percentages above 90% during sleep are considered normal. So if he falls, he will make a record of it. If you can’t see the data or it’s missing, it may be because your watch isn’t snug on your wrist to allow the optical sensors to continuously monitor your blood oxygen levels.


Yes, Samsung can track your snoring, but you’ll need to use your phone, the Samsung Health app, and your smartwatch to track it. It works by using your phone’s microphone to record snoring. To set up snore detection:

Go to the Samsung Health app and go to the sleep tile.
Touch the three-dot icon on the screen to open settings.
Tap “Snoring Detection” and select ” Always ” or ” Once “.
Tap the switch to record sound
Choose if you want to delete audio recordings after 31, 100 or 7 days.
You will need to place the phone on a flat surface (like your bedside table) with the bottom of the phone facing the back of your head. Make sure your phone is plugged in and your watch is connected to it wirelessly. Once you fall asleep, it will start picking up any snoring sounds and record them in the Health app.


Samsung wants to help you sleep better at night, which is why it suggests studying sleep patterns, getting you to complete surveys, completing checklists, and reading sleep-related articles to improve your sleep time.

Within a week of reviewing your data, Samsung will assign you one of eight sleeping animals to represent your sleep pattern. These include: the carefree lion, the sensitive hedgehog, the accommodating walrus, and the tormented shark.

Samsung doesn’t explain why they chose these particular animals, but it looks like it’s an attempt to make workouts and sleep tracking more fun.