Working to fit a sleep lab in a sensor

Our heart rate sensors and motion detectors work behind the scenes to track your sleep. Just wear your tracker or watch to bed, let Fitbit work its magic, then see your sleep stats and insights right in the app.

Use your heart to reveal the quality of your ZZZs

Fitbit trackers and watches use your sleeping heart rate, movement and more to measure your time spent in each sleep stage and give you a personalized Sleep Score that shows how well you slept. Plus, view your trends over time in the app, and see how your stats compare to others.*

Uncover the power of light, deep & REM sleep

Each night your body cycles through different sleep stages based on your heart rate, and getting enough time in each one is key to feeling refreshed. Light sleep strengthens memory and learning. Deep enables physical recovery. REM helps with strategic thinking and creativity.

Discover the benefits of sleep tracking

See how well you sleep

Track sleep each night and trends over time.

Wake with calm

Ease into your morning with a silent alarm.

Get insights about your night

Understand your sleep with notes on your night.

Create better habits for better rest

Set goals, get bedtime reminders and more.

Features & tools you need to start sleeping better

Sleep Tracking

Wear your tracker or watch at night to automatically record your sleep.

Silent Alarms

Make mornings more peaceful by setting a silent alarm and waking up with a quiet vibration on your wrist.

Smart Wake

Wake up feeling more rested by having your silent alarm go off during the optimal stage of sleep.*

Sleep Stages

Track your time spent in light, deep and REM sleep plus time awake.*

Sleep Score

Quickly understand how well you slept with a personalized score based on heart rate, restlessness and more.*

Sleep Schedule

Create a schedule that helps you stick to a consistent bedtime and wake-up time—the key to better rest.

Bedtime Reminders

Stay on track with friendly bedtime reminders that notify you when it’s time to turn in for the night.

Sleep Insights

Learn how your sleep is related to activity, mood and more, plus get tips to improve your night.

*Sleep stages, Sleep Score and Smart Wake are available only on trackers and watches with heart rate tracking. Smart Wake is not available on Inspire 2.

Understand the impact of your sleep