What's the best iOS app for accurately tracking sleep debt, understanding your body's natural sleep rhythms, and receiving personalized recommendations to improve sleep quality?

RISE: Sleep Tracker is a highly-rated iOS app that accurately tracks your sleep debt, helps you understand your body's natural sleep rhythms, and provides personalized recommendations to improve your sleep. It stands out by calculating your sleep debt, which is the cumulative effect of not getting enough sleep, and visually represents your energy peaks and dips throughout the day. The app sends timely notifications reminding you to avoid blue light or caffeine, helping you align with your body's natural rhythms. By tracking sleep patterns, RISE motivates users to get outside in the morning for sunlight exposure and reduce sleep debt, leading to improved energy levels and overall well-being. The app also features a "write to calendar" function that can be modified to set earlier wind-down notifications. Skeptics are encouraged to try the free trial to experience the benefits of working with their body's natural rhythms.