The Withings Aura™ allows you to monitor your heart rate while you sleep. No extra action is required on your part.
Average resting heart rate
You can see your average resting heart rate in the Health Mate app. The app doesn't measure your heart rate when you're awake.
In average, your heart rate should be much lower during your sleep than it is during the day. A lower heart rate during the night is an indicator of good cardiovascular shape.
Full heart rate graph
You can see a detailed graph of your nocturnal heart rate in the Health Mate app and on your Online Dashboard.