Fitbit Sleep Tracker Review

Our Review Process | Disclosure


Tuck’s sleep product recommendations are based on more than 300,000 verified customer experiences and our team’s exhaustive testing procedure.

This research is supported by you, our readers, through our independently chosen links, which earn us a commission. Read more about how we’re supported here.

The Fitbit Sleep Tracker

Fitbit, Inc. founders Eric Friedman and James Park felt that technology had finally advanced to a point where it could give an in-depth understanding about health and fitness. They launched their business in 2007, and within a decade, Fitbit became a highly visible staple of the fitness tracking industry. Their brand’s technology also fueled more than 200 research studies about health and fitness.

Customers use Fitbit trackers to keep tabs on the most important areas of their life as it relates to health and wellness. This includes activity level, diet, exercise, weight, and sleep. All Fitbit trackers collect sleep data, including time spent awake in bed, how long you slept, and if you were restless at night. Fitbit devices that include heart-rate tracking will also measure your sleep stages, including the amount of time you spent in each stage.

The Fitbit uses GPS tracking to allow you to know how far you’ve walked, ran, or hiked. The app lets you keep track of how many calories you eat and log your workout activities. In addition to providing accurate information about each of these topics, Fitbit provides routine reminders to get active and meet your fitness goals.

Fitbit currently offers five fitness trackers: Flex 2, Alta, Alta HR, Charge 3, and Ace (made specifically for children), as well as two smartwatches: Versa and Ionic. Fitbit trackers come in a variety of colors and designs to fit your lifestyle and preferences.

All Fitbit’s sleep and fitness trackers provide basic information about sleep and fitness, though some products provide more detailed information for higher quality monitoring.

Everything You Need to Know About the Fitbit Sleep Tracker

Before you buy a Fitbit tracker, you need to know a few key things about the product. Please read on to learn what people are saying about this sleep and fitness tracker and if it’s best suited for your needs.

Product Ratings

Category Rating What Users Are Saying
Ease of Use Excellent The Fitbit is very easy to set up and start using. Customers say it’s so comfortable to wear that often you forget you’re wearing it.
Sleep Tracking Accuracy Very Good The sleep tracking was among the more popular aspects of the Fitbit, and customers were very happy with the sleep tracking. They found it to be accurate and used the information to improve their sleep routines.
Sleep Tracking Support Fair Customers complain constantly about syncing issues. The device works very well when successfully synced, but when it doesn’t, no data gets collected.
Additional Features Good Fitbit’s customers said they appreciated the regular notifications to stay active and that additional features such as calorie and water intake monitoring helped them stay on track with their fitness goals.
Price Very Good Aside from certain issues, customers seemed to agree that Fitbit is a sound investment for anyone who’s serious about getting started on improving their overall health.
Battery Life Good Customers were pleased with battery life overall, as their trackers can go five to seven days between charges. The most common complaint was that the more active you are, the quicker the battery drains and the shorter the battery life gets between charges.

Sleep Tracking

Fitbit provides automatic tracking to record the amount of sleep you get in a given night. The device also tracks the amount of time spent in different sleep stages. Each night, your body goes through different stages of sleep: light sleep, deep sleep, and REM. Fitbit keeps tabs of what sleep stage you’re in and the amount of time you’re in a specific stage using sensitive motion detectors and PurePulse heart rate tracking.

When your heart beats, the capillaries expand and contract. Using green LED lights, your Fitbit checks any changes in blood flow. The PurePulse heart rate tracker uses this information to track your heartbeats per minute. Your heart rate and blood pressure change according to your sleep stage; Fitbit measures these difference to determine which sleep stage you’re in and for how long.

In addition to automatic sleep tracking features, Fitbit provides customers with the ability to proactively improve sleep patterns through certain app features. For instance, you can create a personalized sleep schedule based on your sleep goals, recent data trends, and your wake-up target. Fitbit will remind you when it’s time to prepare for bed, ensuring you go to sleep at a reasonable hour. The alarm option uses gentle vibrations to slowly wake you up, making it a popular alternative to the traditional and often jarring alarm clock.

It’s important to double-check the exact sleep tracking features that your Fitbit device is capable of as some Fitbit trackers have more features than others.

Additional Features

Fitbit has a wide array of useful features apart from sleep tracking. Fitbit users can track calorie consumption, heart rate, and steps taken in real-time. Instead of having to wait for a day to pass to make plans about how you eat or what level of activity is effective for you, Fitbit lets you access this information in a matter of minutes and adjust your health-related decisions immediately.

Fitbit tracks your activity level and reminds you to get active if you sit for too long. It’s also useful for remembering your water intake. These gentle reminders help you stay on track for when life makes you too busy to remember these details yourself.

You can share your Fitbit data on social media, making family and friends aware of your fitness goals. The option provides the chance to let others hold you accountable, ensuring you’re more likely to reach fitness goals. You can also challenge others to match or exceed your achievements, adding an element of fun to your health aspirations.


Fitbit trackers are competitively priced. For those who want a basic sleep and fitness tracker, they can simply invest in a less expensive device while those who want more detailed perks can spend a little more. Fitbit’s range of fitness trackers will suit practically any budget.

Battery Life

Some Fitbit trackers have slightly longer battery lives than others. For instance, the Fitbit Charge and Alta HR each have a battery life of up to seven days. However, Fitbit’s Alta, Flex 2, and Ace hold their charge for up to 5 days.

To charge your device, Fitbit recommends plugging your charging cable into the USB port on your computer or another low-energy device. Avoid using a USB hub or battery pack to charge your Fitbit tracker. You can use a UL-certified USB wall charger. Fitbit suggests only ever charging the device using the cable that it came with.


Fitbit’s trackers are compatible with more than 200 Apple, Android, or Windows 10 phones or tablets. It will sync up with devices that run iOS 10 or higher and OS 5.0 or higher. You can visit Fitbit’s website to search for your device to make sure it’s compatible with the Fitbit tracking system. Even if you believe your phone or tablet will likely work with Fitbit, it might be a good idea to check for compatibility before making your purchase.

More Considerations for the Fitbit Sleep Tracker

Care and Maintenance

Fitbit devices often come with customizable bands, and cleaning requirements change depending on the type of band you have.

For instance, if you’re wearing an elastomer band, clean the band and your wrist with water or a small amount of rubbing alcohol. Do not clean using a hand sanitizer, dish soap, body soap, hand soap, cleaning wipes, or household cleaner as these can get trapped between the band and skin and cause irritation.

Leather bands must be wiped down with a non-abrasive lint-free cloth, lightly dampened at most. Fitbit’s leather bands aren’t resistant to water, and cleaning with water might cause discoloration. Metal bands might also experience tarnish or discoloration if excessively cleaned with water.

Shipping & Delivery

Fitbit first emails you a confirmation number for orders made through their website. Later you’ll receive a second email with the tracking number. Tracking information can take between one to two days to update. Orders usually ship between 24 to 48 hours after you place an order. Fitbit gives you an estimated delivery date when you place your order, but asks that you wait an extra couple of days reaching out to customer support if your package hasn’t arrived yet.

Fitbit ships all over the world. Free shipping is available to customers in the United States, Canada, and throughout Europe. It’s also possible to obtain free shipping if you spend $50 or more on the website. If you opt for free shipping, delivery can take anywhere between five and fourteen days depending on your location. Fitbit recommends free shipping for anyone attempting to ship a fitness tracker to a P.O. Box or U.S. military address.

Items shipped within the United States are subject to taxes depending on the state or U.S. territory.

Return Policy and Warranty

Customers who are unhappy with their Fitbit purchases can return their products within 45 days of shipment for a full refund. Products purchased in November and December can be returned through January 31 of the following year. If you’re in the United States, you can initiate returns through Fitbit’s return tool. Although refunds are available, Fitbit trackers cannot be exchanged for new devices at this time.

Fitbit sleep and fitness trackers have a limited one-year warranty. The exception is for devices purchased in the European Economic Area (EEA). For EEA purchases, the device has a limited two-year warranty.

If the product has defects, Fitbit will repair or replace the device free of charge. To receive warranty service, you must contact customer service and initiate a return authorization.

Additional Tuck Resources

If you’re interested in learning more about sleep trackers, check out our other product reviews below: