Why We Don't Show a Sleep Score (And Why That Might Be Better)

The Score Problem

Every sleep tracker on the market gives you a number. Sleep score: 82. Sleep quality: Good. Recovery: 67%. You wake up, check your score, and either feel validated or defeated before your feet hit the floor.

This is a product design choice, not a scientific necessity. And we think it's the wrong one.

Orthosomnia: When Tracking Makes Sleep Worse

Researchers at Rush University Medical Center coined the term orthosomnia to describe patients who became so obsessed with their sleep tracker scores that it actually worsened their sleep. They'd lie awake worrying about their score. They'd feel tired not because they slept badly, but because their tracker said they did.

The paper, published in the Journal of Clinical Sleep Medicine, documented multiple cases of patients whose anxiety about sleep tracking data created a self-fulfilling cycle of poor sleep.

What a Score Actually Is

Here's what most people don't realize: that sleep score is a proprietary algorithm that each company calculates differently. Oura, Apple, Whoop, Fitbit — they all use different formulas. None of them are validated against polysomnography in a way that would make a sleep researcher comfortable.

A score of 85 on one device means something completely different from 85 on another. And neither number tells you what to actually do differently.

What We Show Instead

Komori is designed to show you what happened — your position timeline, your movement frequency. Your environmental conditions. How many times you changed position. How long you stayed in each position.

These are objective measurements. They don't require a proprietary algorithm to interpret. And they give you something actionable. A user might look at one night and see: six hours on the back, with snoring intensity peaking in the same window. That's more useful than "Sleep score: 72."

If you're looking for a sleep tracker that shows a detailed overnight timeline instead of just a score, see our guide on sleep trackers with minute-by-minute overnight timelines.

The Philosophy

We believe in data, not judgment. Show people what happened during their sleep and let them — ideally with their doctor — decide what it means. A number on a screen feels authoritative but often isn't. Your actual sleep data is both more honest and more useful.

You slept how you slept. Let's look at what happened and figure out what to try next.