When You’re Sleeping
Sleep tracking for the Apple Watch has long been rumored to be in development. But as of the writing of this article, the Apple Watch doesn’t support it. That means there’s little reason to wear your Apple Watch to bed (unless, of course, you’re concerned about your heart health and heart alerts from your Apple Watch during your sleep).
There are some reasons not to, as well. It’s likely that your sleep hours are the most convenient time to charge up your watch. Wearing it to sleep may also be uncomfortable or distracting if the display switches on or any sounds play during the night. Just put it on your nightstand and use another option for sleep tracking.