Best Sleep Trackers (2020 Guide and Review)

This guide is meant to serve as a comprehensive review of the best sleep trackers available in 2020. When evaluating each sleep tracker we took five factors into account:

  1. Accuracy
  2. Quality of Construction
  3. Ease of Use
  4. Battery Life
  5. Price
best sleep trackers

Best Sleep Trackers (Expert Reviews)

Best Value: LETSCOM Smart Watch Fitness Tracker 

letscom smart watch

The winner of the best value award goes to a company that isn’t one of the bigger names in the sleep/fitness tracking game, but none the less has produced a robust offering at a rather reasonable price.

The Letscom ID205L Smartwatch comes with a beautiful 1.3-inch TFT-LCD color touch screen that features 4 customized displays. The colors on this display are vibrant, and the blacks are dark and crisp.

Just like all of the other wearable sleep trackers tested, this one comes packed with a variety of other health tracking and productivity features as well. You can track your entire day of fitness activity, as well as your sleep habits.

By monitoring your heart rate, this tracker will record your sleep automatically, measuring awake, light and deep sleep and will wake you up with your choice of silent vibrating alarms.

There’s no worrying about battery life with this tracker! Letscom built this smartwatch with an excellent 210mAh battery that lasts up to 10 days on a charge.

Bonus: A magnetic charger is included with this tracker.

  Product Details Price
LETSCOM Smart Watch Fitness Tracker Best Value

1.3-inch TFT-LCD color touch screen

Lasts up to 10 days on a charg
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Best Overall:  Fitbit Versa 2 Health & Fitness Smartwatch

The best overall sleep tracker goes hands down to the Fitbit Versa 2. Packed in a gorgeous smartwatch, the Versa 2 comes with every single feature your could want in a sleep tracker, and is even future proofed with more features on the way (more below).

The Versa 2 screen is made of gorilla glass for the ultimate protection, and Fitbit upgraded the display from LCD to OLED. The screen is one of the best we have ever seen on any fitness tracker!

The battery life of the Versa 2 is equally amazing. Users can expect to get 6-10 days of constant use from a single charge.

The Versa 2 is built with a tri-wavelength sensor on board, which includes SpO2 monitoring. This means that you can measure your blood oxygen levels. Using this technology, Fitbit will soon allow you to be able to track potential sleep apnea or other breathing conditions.

While the Versa 2 comes in at the top of the price point for wearable fitness/sleep trackers, if you are looking for the best of the best then it is a must purchase.

Bonus: Fitbit has also activated a new feature called “Snore Detect” which uses the microphone of your Versa 2 to track data about your nighttime snoring habits.

  Product Details Price
Fitbit Versa 2 Health & Fitness Smartwatch Best Overall Sleep Tracker

Gorilla Glass Screen

Built-in SpO2 Monitoring
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Best Budget Sleep Tracker: Xiaomi Mi Band 4

Not everybody needs a super expensive sleep tracker with all of the bells and whistles. If you are looking for a reliable way to track your sleep without breaking the bank then the Xiaomi Mi Band 4 is a great option.

The Mi Band 4 comes with a gorgeous 0.95″ AMOLED Color Display which really looks great when displaying bright colors.

This sleep tracker uses a thin oval shaped screen as opposed to the squarish screens seen on smartwatches. Some people prefer this form factor, while others like a screen more akin to an Apple Watch.

Battery life is really where the Mi Band 4 shines though, as many users report getting up to 20 days of use on a single two hour charge! Our research shows that this wearable has the best battery life of all the top sleep trackers available.

While the Xiaomi Mi Band 4 is the most inexpensive option included in our “Best Of” awards, it has proven to measure sleep just as accurately as its top wearable peers.

Bonus: The Mi Band 4 is rated waterproof up to 50 Meters, so you can wear it swimming, in the shower, or in the rain.

  Product Details Price
Xiaomi Mi Band 4 Best Budget Sleep Tracker

0.95″ AMOLED Color Display

Up to 20 Day Battery Life
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Best Wearable Tracker: Fitbit Versa 2 Health & Fitness Smartwatch

Also the winner of the Best Overall sleep tracker, the Fitbit Versa 2 is the obvious choice for best wearable tracker as well.

With the largest display of all of the sleep trackers tested, the Versa 2 not only makes a great sleep tracker but a great overall wearable device.

Checking your email and messages is easy and controlling your music via the Spotify app is painless.

Integrated Amazon Alexa support allows you to get up to the second news, check the weather, set timers and alarms, and control all of your smart devices with just your voice!

Whether you just want a wearable device exclusively for sleep tracking, or you want it as a fitness/productivity tracker as well, the Fitbit Versa 2 is the best device available.

Bonus: Control your Spotify app, download Pandora stations and add Deezer playlists plus store 300+ songs on your wrist.

  Product Details Price
Fitbit Versa 2 Health & Fitness Smartwatch Best Wearable Sleep Tracker

Amazon Alexa Support

Controls Music Apps
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Best Under Mattress: Withings Sleep Tracking Pad 

Wearable sleep trackers comprise most of the sleep tracker market, but what if you want a set it and forget it option that you don’t have to wear to bed with you?

Withings Sleep is the most non intrusive sleep tracker that still gives you accurate data and actionable advice.

Once you install the pad underneath your mattress and sync it via your home wifi, you can just lay down each night and have the results of your sleep delivered to you each morning via a very intuitive app.

It’s able to collect granular data like sleep duration, interruptions in sleep, and type of sleep (light, REM, deep). You can also track snoring, with a built-in microphone.

Another great feature of Sleep is the ability to control it via Amazon Alexa, as well as setting recipes via IFTTT. Imagine being able to automatically set the perfect temperature and lighting based on suggestions from the device.

For a hands completely off sleep tracking experience that gives amazing insight, the Withings Sleep is an excellent choice.

Bonus: Withings Sleep can now help you identify the signs of breathing disturbances and is working toward medical certification of the device to detect sleep apnea.

  Product Details Price
Withings Sleep Tracking Pad Best Under Mattress Tracker

Control Smart Home Devices

Easy Installation
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Best Bedside Sleep Tracker: SleepScore Max Sleep Tracking Device

sleepscore max

SleepScore Labs has really put together an awesome beside sleep tracker in the SleepScore Max!

The SleepScore Max is shown to enhance your sleep quality in as little as one week. Based on the analysis of over 1,000 SleepScore Max users, over 55% of them increased their amount of sleep by at least 45 minutes after 3 nights of use.

This tracker uses Resmed technology(backed by 12 years of testing) that is only rivaled by actual sleep clinics, and because only focus is tracking sleep, you can rest easy knowing that you are getting proper recommendations!

The SleepScore Max tracks your breathing patterns from your bedside using a reflection technique that is similar to what bats use to see, by sending out ultra-low power radio waves.

It also detects light and sound in your bedroom environment for a complete sleep analysis and every morning the companion app allows you to view your quality scores, personalized insights, and actionable advice.

The Sleepscore Max is by far the most accurate of all bedside sleep trackers tested, and is one of the overall best sleep trackers available.

Bonus: Using “Smart Alarm” technology, the SleepScore Max can wake you up when you hit your light sleep cycle, ensuring that you’ll rise feeling refreshed and ready for the day.

  Product Details Price
SleepScore Max Best Bedside Sleep Tracker

Enhances sleep quality

Detects light and sound in your bedroom
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Are Sleep Trackers Accurate?

best sleep trackers

Sleep trackers can help you understand your general sleep patterns, but they are still at the very early stages of accurately tracking sleep.

While the using the recommendations of a sleep tracker are definitely better than using nothing at all, anything short of an overnight sleep study performed at a sleep clinic will not be 100% accurate.

That being said, most people don’t have a sleep problems severe enough to go to a sleep clinic, and really are just wondering how they can best optimize their sleep.

For these people, buying a sleep tracker is the perfect way to better understand how to hack sleep to get more energy and focus during the day.

In a perfect world, we would all get the necessary 8 hours of uninterrupted sleep each night and wake up each morning feeling refreshed and rejuvenated. 

In the real world, many of us suffer from a mild, or perhaps more severe, case of sleep deprivation (AKA not enough sleep).

One way to determine if you’re lacking in the snooze department is to begin tracking your sleep habits. This can be easily done by investing in a reliable sleep tracker.

Sounds good, but… how do sleep trackers actually work?

The first step in understanding how sleep trackers work is to know just what these trackers are actually tracking.

What Do Sleep Trackers Monitor?

While no two sleep trackers are exactly the same, they all share two common features: they monitor whether you are asleep or awake and they track how much time you spend sleeping

The ability to track both the quality and duration of sleep you receive is extremely important because it will help determine whether you are a restless or restful sleeper. 

Other aspects of sleep that can be measured through these tracking devices include:

  • Time spent in each stage of sleep (REM vs non-REM sleep)
  • Quality of your sleep environment (light or temperature of your bedroom)
  • Lifestyle factors that may be affecting your sleep (heart rate, food consumption, stress levels)

How Do Sleep Trackers Measure These Factors?

Body Movement

The number one way sleep trackers are able to measure the amount of time you spend asleep is by tracking your body movements. 

Because we are typically more still when sleeping than when awake, body movements are a great indicator of overall sleep duration and quality.

Wearable sleep trackers are able to measure body movement through built-in sensors, a method called actigraphy. Non-wearable sleep trackers rely on other methods such as echolocation and motion sensors.


The presence or absence of noise can be a major indicator to whether you are asleep or awake at any given moment.

Using an internal microphone, sleep trackers are able to record any noises that may be interfering with your ability to sleep peacefully through the night.

These noises can come from within your body, like snoring or sleep apnea-related breathing irregularities (gasping or choking sounds), or from devices in your bedroom such as TVs or smartphones.

Heart Rate

Another method that sleep trackers use to determine the quality and duration of your sleep is by monitoring your heart rate throughout the night. 

Because your heart rate remains steady throughout non-REM sleep and spikes during REM sleep, this is also one method of determining how long you’re in each stage of sleep.

Wearable sleep trackers use built-in heart rate monitors (HRM) to measure your pulse, while non-wearable trackers rely on ballistocardiography (BCG) to evaluate heart rate.


The temperature of your sleeping environment plays a major role in the overall quality of sleep you get. 

Many sleep trackers include a thermostat feature which is able to determine the temperature of your bedroom throughout the night and how it may be affecting your sleep.

Some can even connect with your smart home devices to regulate your room temperature based on your personal sleep data.

Blood Oxygen Levels

The latest and greatest sleep trackers on the market are able to monitor your blood oxygen levels using a SpO2 sensor.

This technology can help you determine if you suffer from sleep apnea or other breathing disorders that may interrupt your sleep. 

While variations in your blood oxygen levels are often an indicator that sleep apnea is present, the only way to be 100% sure is to undergo a professional sleep study.

Personal Sleep Tracking vs Professional Sleep Study

Investing in a reliable sleep tracker is a great way to learn the basics of your sleeping habits, but it won’t always tell you everything you need to know.

The one true way to learn ins and outs of your overall sleep health is to take part in a professional sleep study, otherwise known as polysomnography (PSG).

During a polysomnogram, sleep specialists are able to measure additional sleep factors such as eye movement through electrooculography (EOG).

Most importantly, professional sleep studies monitor your brain waves through electroencephalography (EEG) to determine the accurate amount of time you spend in each sleep stage.

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