Many Fitbit trackers tell you how long you are asleep and the type of sleep you get while under the sheets. Curious how it works? Here's a rundown on the feature and an explanation of the different sleep stages your Fitbit tracks.
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To take advantage of the Fitbit Sleep Stages technology, you need to use a device that supports it and can monitor your heart rate. Most newer Fitbits, such as the Fitbit Charge 5, Fitbit Luxe, and Inspire 2, can track sleep, and some of the older ones can as well, such as the Fitbit Alta HR, Fitbit Blaze, and Fitbit Charge HR.