Please share thoughts/experince with tracking devices and apps for sleep. Presently using Apple Watch Ultra and the Pillow app for tracking Sleep. Thank you. Love the information you share in the guest you have on your podcast!

The Apple Watch Ultra and Pillow can be useful for noticing sleep patterns and how habits relate to them, but treat their scores as estimates—not definitive measures of sleep or next-day readiness.

• Sleep trackers and habits: Tracking can reveal patterns, such as how alcohol or a late snack affects your sleep, and may help guide behavior. 1
• Sleep-stage accuracy: Consumer trackers’ sleep staging is imperfect; one sleep researcher estimated the best devices at about 70% effective. Use the data as one input alongside how you actually feel. 2 3
• Don’t let the score set your expectations: Being told you slept poorly can make you feel more tired, even when objective sleep was good. Avoid letting a low score dictate how you expect to feel or perform; if checking scores creates anxiety, consider looking less often or waiting until later in the day. 4 5