You will spend about 30% of your life asleep. Across an average lifespan that is somewhere between 20 and 30 years. Hours are the easy part to count, and only a thin slice of what decides whether those years actually restore you.

So we rebuilt the sleep system in Gyroscope from the ground up: more of the signals that matter, read against your own pattern, with one clear thing to try the next night.

A score that reads like a coach

The old score counted the night. The new one explains it. Every morning you get the number, and then the drivers behind it: how steady your oxygen stayed, what your heart rate and HRV did while you recovered, how the night compares to your own recent pattern rather than a generic average.

Unsteady oxygen is one of the clearest signs that hours in bed did not turn into real rest. Sleep apnea is common in adults and most cases are never diagnosed, and the thing that gives it away is oxygen dipping again and again through the night. That is invisible if all you count is hours in bed, so now it is part of the score.

HRV shows what the night cost. Lower heart rate variability has been linked to higher all-cause mortality risk across cohort studies, and overnight is when you get the cleanest read of it, before the day starts moving the number. The new sleep cards read it back to you in plain language.

Caffeine, on the same clock

One of our favorite parts of the new system is the caffeine timeline. It takes what you logged, models how it decays through the day, and lines it up against the moment you actually fell asleep. If you have DNA connected, it even uses your CYP1A2 variant to estimate your personal caffeine half-life.

This started as an internal experiment: we kept seeing members whose sleep quality swung with no obvious cause, and afternoon caffeine was the missing variable. Once you can see the gap between "caffeine clear" and "asleep" as an actual chart, the fix tends to suggest itself.

Built around your pattern, not the average

The design principle behind the whole rebuild: consistency outperforms duration. In a 2024 analysis of roughly 60,000 people in the UK Biobank, how regular someone’s sleep was predicted mortality risk better than how long they slept. So the scoring reads your own nights, week over week, instead of grading you against a fixed bedtime. Irregular schedules are expected, not penalized.

It works with what you already wear. Oura, Apple Watch, Whoop, Fitbit and Garmin all feed the sleep stack, and if you sleep with nothing on your wrist, your phone still gets you a usable read.

How to start tonight

Update to the latest version of Gyroscope, sleep, then open Sleep in the morning. That is the whole setup. Your first score is waiting for you after one night.