
On Monday mornings I open my sleep tracker app with trepidation in my heart. Following a Sunday night punctuated by 3 a.m. wake ups and endless tossing and turning, I worry I'll have earned a rock bottom sleep score and a telling off from my Withings Sleep Tracker, which costs around $199.95 / £129.95 at Withings.
However, I'm often in for a pleasant surprise. Yes, my data lags behind the results for the days of the week I don't have an anxiety-inducing early morning commute, but they tend to be good overall — scores in the high 70s and green lights for many of the metrics tracked (such as sleep regularity, and breathing quality during sleep).