Nocturne: Sleep Insights

Nocturne is the calm, honest sleep companion for people who wear their watch to bed. Each morning it turns your overnight data into a clear, five-second story of your night — so you can understand your rest without studying a manual. WAKE UP TO ONE CLEAR NUMBER At the center of Nocturne is the Recharge score (0–100): a single, plain-English read on how well you recovered. Tap "Why this score?" and Nocturne shows exactly how duration, deep and REM share, efficiency, heart-rate dip, and continuity each contributed. Nothing hidden, nothing over-claimed. SEE YOUR NIGHT, BEAUTIFULLY - A clean hypnogram of how you moved through awake, REM, light, and deep - Your overnight heart-rate curve with the recovery dip highlighted - Stage breakdown with durations and percentages - Sleep efficiency that never exceeds 100% TRUST BY DESIGN Nocturne prefers your device's native sleep stages as the source of truth and clearly labels when it falls back to its own estimate. It never silently rewrites your history — any manual adjustment is explicit, reversible, and visibly noted. CALM, NOT CLUTTERED A soft, dark "night sky" aesthetic and progressive disclosure mean you get the headline first and the depth only when you want it. No wall of rings on day one. TRENDS & SLEEP BALANCE Follow duration, Recharge, deep sleep, sleeping heart rate, and HRV across 7 days, weeks, and months. Sleep Balance tracks your rest against a personal goal with gentle, non-judgmental coaching. PRIVATE BY DEFAULT Your health data is analyzed on your device. Nocturne does not sell your data and never uses health information for advertising or tracking. A NOTE ON WELLNESS Nocturne is a wellness and informational tool, not a medical device. It does not diagnose, treat, or prevent any condition.