Insights
Sleep Score
Your sleep score shows how well you slept compared to healthy sleep standards.
What affects your score:
• How quickly you fall asleep
• How long you sleep
• How often you wake up at night
Your score is unique to you. Compare it with past nights, review your full report to understand your sleep patterns, and adjust your daily habits to see steady improvement over time.
Sleep Latency: The time it takes to fall asleep from the moment sleep aid begins — showing how quickly you fall asleep.
Total sleep time (TST) ： The cumulative duration of sleep obtained during a sleep period— showing how long you sleep.
Sleep Onset Analysis
Sleep Onset latency: the amount of time it takes to transition from trying to fall asleep to actually entering the sleep stage.
Wakefulness level: The user's current state of alertness, calculated based on the relative changes among different frequency bands in the EEG.
Sleep Stages
Sleep is a cyclic process that consists of three main stages: Wake, Rapid Eye Movement (REM), and Non-Rapid Eye Movement (NREM). Each stage has distinct features, patterns, and time proportions.
Core Features of Each Stage
Wake: Similar to daytime wakefulness — clear consciousness and normal sensory activity (vision, hearing, touch, etc.).
REM Sleep (Rapid Eye Movement): Usually begins about 90 minutes after falling asleep. Characterized by rapid eye movements, reduced sensory perception, and muscle relaxation. Most dreaming occurs during this stage.
NREM Sleep (Non-Rapid Eye Movement): The stage without eye movements, marked by slower breathing and muscle relaxation. It includes three substages with increasing sleep depth:
N1 (Light Sleep): The transition stage between wake and sleep; easy to wake.
N2 (Stable Sleep): Moderately deep and accounts for the largest portion of total sleep.
N3 (Deep Sleep): The deepest stage, characterized by large, slow brain waves (slow-wave sleep). Essential for physical restoration.Sleep Cycle Pattern
Sleep progresses in a recurring sequence: N1 → N2 → N3 → REM → back to N1, sometimes with brief awakenings.
Each full cycle lasts about 90–120 minutes, and most people experience 4–6 cycles per night.Typical Time Proportions
Deep Sleep (N3): ~15–25%
N1 + N2 (Light & Stable Sleep): ~50–60%
REM Sleep: ~25%
Sleep Regularity
Sleep regularity refers to the consistency of a person's daily sleep and wake times, as well as the stability of their sleep duration and sleep architecture.
In simple terms, it describes whether your sleep is "about the same every day".
It primarily includes the following aspects:
- Consistency of bedtime
(e.g., going to bed around 23:00 every night instead of fluctuating between 22:00 and 02:00) - Consistency of wake-up time
- Stability of sleep duration
(e.g., sleeping approximately 6 hours each night instead of alternating between 4 hours and 9 hours) - Stability of sleep architecture
(whether deep sleep and REM stages follow similar patterns across nights) - Alignment with circadian rhythms
(whether the biological clock is functioning in a regular, synchronized manner)
Sleep regularity reflects how well the body's internal clock is operating.
Heart Rate and Blood Oxygen During Sleep
Heart Rate (HR):
During sleep, your heart rate gradually decreases as your body relaxes.
Deep Sleep: Heart rate is at its lowest, supporting physical recovery.
REM Sleep: Heart rate becomes more variable due to active brain activity and vivid dreaming.
Tracking heart rate trends helps assess your sleep quality and recovery efficiency.
Blood Oxygen (SpO₂):
Blood oxygen levels typically stay stable throughout sleep.
A normal range is around 95–100%.
Significant drops may indicate breathing disturbances, such as snoring or sleep apnea.
Monitoring SpO₂ helps detect potential respiratory issues and ensures adequate oxygen supply during rest.
Why It Matters:
Together, HR and SpO₂ data provide insight into your cardiovascular and respiratory stability, helping you understand how well your body recovers during sleep.
Body Position During Sleep
Body Position Data:
During sleep, your body naturally changes position several times. Common sleep positions include supine (on the back), lateral (on the side), and prone (on the stomach). These changes reflect muscle relaxation, comfort adjustments, and normal sleep cycles.
Why It Matters:
Frequent position changes may indicate restlessness or discomfort.
Staying in one position too long may affect blood flow or breathing.
Sleeping on your back may increase snoring or sleep apnea risk, while side sleeping can improve breathing.
Tracking sleep posture helps you understand your sleep comfort, breathing quality, and potential sleep-related issues.