Go to the Profile tab > Premium > Heart Rate > Choose ‘On’ to enable Heart Rate.
If the Heart Rate Monitor still doesn’t work, you need to allow Sleep Cycle permission to use the camera.
Go to: Settings > Privacy > Camera > Turn on permission for Sleep Cycle
Users who activate the heart rate reading will be asked to place their finger on the camera lens to record their wake-up resting pulse. Their heart rate will then be included in their sleep analysis graphs.
This feature is not yet available for Android users.