Amazon.com: Fitbit Luxe Fitness and Wellness Tracker with Stress Management, Sleep Tracking and 24/7 Heart Rate, Black/Graphite, One Size (S & L Bands Included) : Sports & Outdoors
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Fitbit not tracking sleep or is not accurate? Let's fix it - MyHealthyApple
Fitbit's new sleep-tracking feature works well (most of the time) | Engadget