FitRest gives every night a Sleep score from 0 to 100 with a plain label, from Very Poor to Excellent. It sums up how long, how deeply and how steadily you slept in one number, and shows what you could change to sleep better next time.
The Sleep score sits on the Dashboard next to Recovery, and at the top of the Sleep tab as the Sleep Quality Score. It appears as a number from 0 to 100, a word label and a coloured bar running from red to green with a marker showing where your night landed. On the Sleep tab the labels run Very Poor, Poor, Fair, Good, Very Good and Excellent.
Tap it and you open the night in detail. A 14-Day Comparison puts tonight's score next to your recent average with a plain sentence, for example that your sleep quality improved by a given percentage compared with your 14-day average. That makes it easy to tell a one-off bad night from a slide that has been building for a while.
A single number is only useful if you know what moves it. The Why This Score panel scores five parts of your night, each from 0 to 100:
Sleep is when the body repairs tissue, the brain clears and sorts the day, and hormones that control appetite, mood and stress reset. Regularly falling short is linked with poorer focus, low mood, slower recovery from training and a weaker immune response. Most adults are advised to get seven to nine hours a night.
But hours alone do not tell the whole story. Eight broken hours with frequent wake-ups and little deep sleep can leave you more tired than seven solid ones. Going to bed at very different times through the week can throw off your body clock even when the total looks fine. A score that weighs length, depth, continuity and timing together gets closer to how rested you actually feel.
Under the five factors, a Biggest opportunity note names the one that held the night back the most. That turns the score into a next step: if Continuity is the weak point you might look at a warm bedroom or a late drink; if Timing is, a steadier bedtime will likely help more than an extra half hour in bed.
The Sleep score is built from the sleep data in Apple Health, so wear your Apple Watch to bed with sleep tracking turned on. Sleep from other devices or apps that save stages to Apple Health counts too. Each night uses one source, so two devices worn at once are not added together. Naps and split nights are handled on the Sleep tab, and the score follows the main sleep of the day.
Nights labelled Good, Very Good or Excellent mean you got enough sleep with decent depth and few interruptions. A steady run of those matters more than any single high score.
Duration is only one of five factors. Frequent wake-ups, a lot of time awake in bed, little deep or REM sleep, or an unusual bedtime can all lower the score. Why This Score shows which one it was.
The score follows the day's main sleep. Naps and split nights still appear on the Sleep tab so you can see them alongside the main session.
Yes, if it saves sleep stages to Apple Health. FitRest reads from Apple Health and picks one source per night so time asleep is never double counted.
Time in bed, actual sleep, sleep stages and overnight heart rate for every night and nap.
Deep plus REM sleep per night, with findings from your own best nights.
Your chronotype, schedule consistency and sleep trends from your own nights.
A 0-100 readiness score each morning that tells you how well your body recovered overnight, judged against your own normal.
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FitRest reads the data already in Apple Health, so there is nothing to set up beyond granting access.
iPhone, iPad and Apple Watch. Requires iOS 17 or later.