To help you choose the right sleep tracker for your needs, we’ve tested a selection of the most popular devices. We wore each one for several nights, taking note of its accuracy and exploring its additional features, such as fitness tracking, guided meditations and more.
For more tips and tricks, take a look our advice on how to sleep better, how to get to sleep and how to get up early in the morning.
Best sleep trackers at a glance
- Best sleep tracker overall: Oura Ring 4, £349
- Best sleep tracker for iPhone users: Apple Watch Series 10, £379
- Best sleep tracker for Android users: Google Pixel Watch 3, £349
- Best sleep tracker for fitness: Garmin Venu 3, £399
- Best affordable sleep tracker: Fitbit Versa 4, £179
- Best sleep tracking ring without a subscription: Samsung Galaxy Ring, £299
- Best non-wearable sleep tracker: Withings Sleep Analyser Mat, £129
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Best sleep trackers to buy 2025
Oura Ring 4
Available from Amazon (£325.56), Oura (£349), Healf (£349), Currys (£349), John Lewis and Partners (£349)
Best sleep tracker overall
Star rating: 4.5/5
Pros:
- Accurate sleep tracking with advice on how to improve
- The battery lasts up to eight days
- Lots of features including menstrual cycle tracking, cardio capacity, a readiness score
Cons:
- It’s not as reliable for activity tracking as a smartwatch
- The ring is easily scratched
The Oura Ring 4’s comfortable design, advanced features and practical advice make it the best sleep tracker overall.
You’re given detailed reports for each night, including an overall sleep score, time asleep, sleep efficiency, time spent in each stage, resting heart rate and so on. The data is compared to previous nights, so you can monitor how your sleep changes over time. You can even add contextual tags to note what may have had an influence, such as caffeine or alcohol. Unlike elsewhere, there’s an AI chatbot in the app that provides personalised insights and tips about anything related to your sleep.
The Oura Ring 4 also offers in-depth health monitoring, with features that can flag potential signs of illness, provide insights into cardiovascular trends and help track menstrual cycles. You can use it to record activities, although it is not as effective or intuitive as a smartwatch in that respect. It’s worth noting that the Oura Ring 4 does require a monthly subscription fee (£5.99) for many of its most useful features.
Apple Watch Series 10
Available from Very (£379), AO (£379), John Lewis and Partners (£399), Currys (£399), EE (£399), Argos (£399)
Best sleep tracker for iPhone users
Star rating: 4.5/5
Pros:
- Detailed sleep tracking with results on the watch and the app
- Includes sleep apnea detection
- It’s both durable and stylish
Cons:
- The battery only lasts up to 18 hours
- You need an iPhone with iOS 18 or later
iPhone users looking to track sleep, health and fitness should consider the Apple Watch Series 10, because it’s designed to work with iPhones running iOS 18 or later.
It records everything you need to know, including sleep duration and time spent in different sleep stages. The data is presented in convenient graphs directly on the device: you don’t need to open the app on your phone. It can support better sleep by helping you become more aware of your habits, encouraging consistent schedules and promoting healthier bedtime routines. Based on the timings you set, Sleep Focus simplifies the lock screen and disables notifications across your devices, helping to minimise distractions.
The watch needs charging regularly, but if you notice the battery is running low before bedtime, a quick eight-minute charge should get it through the night.
In addition to sleep tracking, the Apple Watch Series 10 can accurately measure workouts, including watersports, as well as take calls, make contactless payments, locate your iPhone and get help in emergencies.
Google Pixel Watch 3
Available from John Lewis and Partners (£349), Currys (£349), EE (£349), Amazon (£399)
Best sleep tracker for Android phone users
Star rating: 4.5/5
Pros:
- Accurate, easy-to-understand sleep tracking data
- Daily cardio load and readiness score
- Tracks 40+ exercises and workouts
Cons:
- Lacks clear guidance on how to improve your sleep
- The battery usually lasts up to 36 hours
With full smartwatch capabilities as well as detailed sleep tracking, the Google Pixel Watch 3 is a top choice for Android phone users. You can buy it in two sizes, 41mm or 45mm and with a selection of watch and band colours. It’s both stylish and comfortable.
When you fall asleep, it’ll automatically set itself to Bedtime Mode, recording detailed information about your sleep stages, duration, sleeping heart rate, restlessness and oxygen variation. It’ll even recognise when you’re taking a long nap during the day.
The watch works in conjunction with the Fitbit app, which is one of the simplest there is. It provides an overall sleep score and weekly, monthly and yearly comparisons for free. But with a premium membership, at £7.99 a month, you’ll get a more detailed breakdown of your stats, including a sleep profile describing your habits to help you recognise and change them. We would have liked clearer instructions on what you can do to make improvements, though.
Garmin Venu 3
Available from John Lewis and Partners (£399), Currys (£399), Garmin (£399.99), Argos (£399.99)
Best sleep tracker for fitness
Star rating: 4.5/5
Pros:
- Detailed sleep tracking with body battery, sleep coach and sleep scores
- Stylish, sturdy and comes in two sizes (41mm or 45mm)
- Up to 14 days of battery life
Cons:
- Not as comfortable to wear as some other trackers
- It’s expensive if all you need is sleep tracking
The Garmin Venu 3 is an excellent choice for fitness enthusiasts seeking to track sleep and get a comprehensive overview of their workouts and health.
It accurately monitors sleep duration, movement during the night, sleep stages and heart rate, while the sleep coach provides personalised insights into your rest and changes you could make. Another helpful feature is the body battery, which considers your physical activity, sleep and stress to report your energy levels throughout the day.
Beyond sleep tracking, the Garmin Venu 3 is a proficient fitness tracker with over 30 sports apps and workouts, along with built-in GPS. It even accommodates wheelchair users within its activity tracking.
You’ll rarely need to charge it, as it lasts up to 14 days, and it looks more like an analogue watch than other devices. However, given its emphasis on fitness, it may be unnecessarily advanced and expensive for some users.
Fitbit Versa 4
Available from Currys (£179), AO (£179), Argos (£179), Boots (£179.99), John Lewis and Partners (£180)
Best affordable sleep tracker
Star rating: 4/5
Pros:
- Easy to compare nightly, weekly, monthly and yearly sleep
- The battery lasts six days or more
- Includes lots of fitness tracking features
Cons:
- The Google Assistant has been removed from the device
- A paid subscription is needed for some sleep tracking features
If you’re on a budget but like the idea of a watch that tracks your health, fitness and sleep, the Fitbit Versa 4 is an affordable option that looks good and performs well.
You can see how long you were asleep for and how much time you spent in each sleep stage. You’ll get weekly, monthly and yearly comparisons and user profiles that categorise what type of sleeper you are. The data gathered overnight, along with your health information, is used to give you a daily readiness and cardio load score, indicating how prepared your body is for exercise and how hard you should push yourself that day.
The Fitbit Versa 4 works as a smartwatch too, with notifications from your phone, contactless payments and access to Amazon Alexa. However, Google has recently removed the Google Assistant and won’t be replacing it with Gemini and you will need to pay a monthly £7.99 subscription fee to get the most advanced sleep tracking features.
Samsung Galaxy Ring
Available from Currys (£299), John Lewis and Partners (£299), Samsung (£399), Amazon (£399)
Best sleep tracking ring without a subscription
Star rating: 4/5
Pros:
- All features come with the ring, no need to pay a membership fee
- Up to 7 days of battery life
- Very accurate sleep tracking
Cons:
- It’s not compatible with iPhones
- You need a Samsung Galaxy phone for features like Gesture Control
The Samsung Galaxy Ring may have a higher cost upfront than other options, but there’s no monthly subscription to pay for. You get everything from detailed sleep insights and training tools to menstrual cycle tracking and a daily energy score straight out of the box.
Each morning, you’re provided with precise sleep and wake times, your sleeping heart rate, sleep stages, overnight skin temperature and more. Everything is compiled into a sleep score and there’s a charming animated icon to illustrate the quality of your rest. You can compare your daily, weekly, monthly and yearly sleep trends, as well as create improvement programs with the dedicated sleep coach.
The primary focus of the Galaxy Ring is on wellness rather than fitness, so it does track workouts, but it’s less exact than a dedicated fitness tracker. You should also be aware that it only works with Android smartphones and you’ll miss out on some features if you don’t have a Samsung Galaxy smartphone.
Withings Sleep Analyzer Mat
Available from Amazon (£129), Boots (£129.95), Withings (£149.95)
Best non-wearable sleep tracker
Star rating: 3.5/5
Pros:
- Stays permanently underneath your mattress
- Includes sleep apnea and snoring detection
- Daily sleep quality score with weekly and monthly comparisons
Cons:
- It’s not as accurate as a wearable device
- Takes a few nights to find the right positioning
If you find it uncomfortable to wear a sleep tracking wearable overnight, there are alternatives worth considering. The Withings Sleep Analyzer is a device that you slip underneath your mattress and it tracks sleep by detecting movements and sounds. It’s about the width of half a double bed, so it’s suitable for someone in a couple or who sleeps in a single bed.
During testing, it took a few nights to get the positioning of the mat right, but it recalibrates itself each day to deliver the best possible results. When you wake up, you can see information on your sleep duration, stages, interruptions throughout the night and the regularity of your sleep pattern. It can even detect your heart rate, sleep apnea and snoring. Plus, you’ll get plenty of advice on how to enhance the quality of your sleep.
The app takes some time to get used to because it’s not particularly intuitive, and we found the sleep tracking was a little inconsistent compared to wearable devices.
How do sleep trackers work?
Sleep trackers measure the quality and duration of your sleep using a combination of different technologies, such as a heart rate sensor, an accelerometer to track movements, a gyroscope to measure rotation and occasionally a microphone.
Using the data it collects overnight, the tracker can detect when you are awake and when you’re asleep, analysing your sleep cycles, including how long you spend in each sleep stage (awake, light, REM and deep sleep).
Every sleep tracker on this list comes with an accompanying smartphone app where you can see useful graphs and statistics about each night. Most will have a sleep score to help you understand how effective your rest was. Some trackers allow you to compare your sleep to the rest of the week, month or year, so you can see how it changes over time. Others provide straightforward advice on how to improve your sleep, like suggesting an earlier bedtime, more consistent wake times or offering guided meditations to help you unwind in the evening.
Most often, sleep trackers are wearable devices, with some worn on your wrist and others designed to resemble a ring on your finger. However, if you don’t think a wearable will be comfortable to wear overnight every night, there are alternative options, such as a mat that sits beneath your mattress.
How accurate are sleep trackers?
Sleep trackers are increasingly popular and can offer useful insights into your sleep habits, routines and general patterns. However, it is important to understand their limitations and not treat them as medical devices.
Most consumer sleep trackers work by monitoring movement, heart rate and sometimes skin temperature to estimate when you are asleep and which sleep stages you might be in. These readings are based on algorithms that interpret changes in your body and activity, but they are ultimately just estimates. Environmental factors, how tightly the device fits and even how often you move during the night can all affect the accuracy of the data. As a result, while sleep trackers can give you a rough idea of how much sleep you are getting and how long you might spend in different stages, they cannot provide a definitive or medically precise record of your sleep.
If you consistently wake up feeling tired despite your tracker suggesting you are getting “good” sleep or if you struggle with ongoing issues such as insomnia, anxiety around sleep or symptoms of sleep apnoea, it is important to seek advice from a GP or sleep specialist. For precise sleep tracking, you’d need to be hooked up to a polysomnograph, which records brain waves. Sleep trackers are not able to diagnose or rule out medical conditions.
Another consideration is the risk of becoming overly focused on the numbers your tracker provides. This can lead to a condition known as orthosomnia, where the pursuit of perfect sleep data actually increases anxiety and can make sleep problems worse.
In summary, sleep trackers can be a helpful tool for spotting trends, making small adjustments to your habits and encouraging better sleep hygiene. They are best used as part of a wider approach to improving sleep, rather than as a substitute for professional advice or medical assessment. For anyone needing precise information about their sleep, a clinical sleep study using equipment that measures brain activity would be necessary, but this is not practical or necessary for most people. If you have concerns about your sleep or are not feeling rested, it is always best to consult a healthcare professional.
How should I choose a sleep tracker?
Which device is right for you depends on how you want to track your sleep (on your body or in your room) and what data you want to collect (sleep, fitness, stress levels and so on).
There are devices that will only track sleep, but if you also want to listen to music, field messages and track your fitness, then you would be wise to consolidate it all into one device.
You should also consider style, materials and ease of use. Usually, the bigger the range of functions, the higher the price, ranging from £130-£400 depending on the spec.
Be aware of additional monthly costs too. As well as the upfront cost of the device, many of the models on this list require a monthly or yearly subscription plan to access additional features or to access the sleep features altogether.
How we tested sleep trackers
Each sleep tracker on this list was tested in realistic conditions, just as you would use it at home. We connected each one to our personal smartphone and tracked at least five nights of sleep, if not more, noting how comfortable it was, how accurately it recorded sleep and wake times, how well-rested we felt in comparison to the tracker’s results and whether we could use that information to improve the quality of our sleep. We paid attention to its setup, battery life, design, usability of its accompanying smartphone app and more.
Some of the sleep trackers have a selection of additional features, like health and fitness tracking, GPS, and messaging. We made sure to test these features as well, using the tracker to record activities (such as runs, tennis, yoga and pilates), to monitor health metrics (like resting heart rate, step count and menstrual cycle), and to reply to messages, control smartphone apps like Spotify and get directions.
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