Apple's new sleep score , now available on the Apple Watch and in the Apple Health app, grades how well you slept on a scale from 0 to 100. Apple calculates your sleep score based on your sleep duration, bedtime consistency, and interruptions. Credit: Beth SkwareckiApple says that over the past month, my most frequent sleep score level is “excellent,” earned on 17 nights. I also had a “high” sleep score on 10 nights, with just one night of “OK” sleep, one of “low” sleep, and no nights “very low.”My major takeaway is that Apple’s scores are almost always higher than those I get from other devices. It is true that there’s probably nothing medically wrong with me, and I don't think my sleep is drastically poor—so maybe Apple’s rosy outlook is just a better way to think about my sleep.