Sleep score
Sleep score is a complete summary of your sleep health.
Sleep score draws a lot of inspiration from the Pittsburgh Sleep Quality Index.
Dashboard - Sleep Score card
Left ☰ menu → Trend → Trend tab → Sleep score chart


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You can choose between colors matching your theme, or color-coding - each dimension has its own color across the whole app (Settings > Personalize > Stats > Color palette). |
If you see you are consistently behind some target for any of your dimensions, you can setup goals. For instance you are sleeping just 6:00 on average which is quite bad for an adult, so you can setup a goal to increase your sleep duration to at least 6:30 and the app will guide you gradually to achieve that goal…
The app will point out some notable trends and also suggest some changes in the Advice section.
1. Sleep score dimensions
There are eight dimensions that contribute to sleep quality. Each of the dimensions has a healthy range and an unhealthy range.
The app combines all dimensions into one "Sleep Score" for simplification (only new version).
Dimension | Explanation | Top figure | Bottom figure | Healthy / Unfavourable range |
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![]() HRV gain |
The difference between your HRV measured during the first low activity period (hrv before) of your sleep and the HRV measure at the last low activity period before awake up (hrv after) (see details here). |
Difference between hrv after and hrv before. |
HRV after (the last low activity period before awake up). |
Healthy: over 2 |
![]() Breath disturbances |
Breathing disturbance episodes per hour, read more about this topic here and here. |
Average breathing disturbance episodes per hour. |
Healthy: under 10 |
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![]() Irregularity |
How irregular your sleep is. Variance of your mid-sleep hour. |
Deviation of sleep duration and mid sleep hour. |
Healthy: under 0.5 hours |
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![]() Deep Sleep |
How long you’ve been in deep sleep compared to the total sleep duration. |
Average % of deep sleep |
Duration |
Healthy: over 30% |
![]() Duration |
How long have you been sleeping. |
Average duration |
Deficit or surplus |
Healthy: 6.5 hours to 8.5 hours, see how this differs with age |
![]() Efficiency |
How long you’ve been actually sleeping vs. being in bed. |
Sleep/awake ratio in % |
Average duration of awakes |
Healthy: over 95% |
![]() Rating |
Your average subjective rating. |
Your average rating |
Max rating |
Healthy: over 3.5 stars |
![]() Snoring |
How long you’ve been snoring compared to the total sleep duration. |
Average % of snoring |
Total duration of snoring |
Healthy: under 3% |
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Healthy durations are adjusted according to your age as defined in Settings → Stats → Year of birth
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If you’re in the healthy range for a certain dimension, it lights up green and you get one point. Every line can also turn red if the values are in a very unfavourable range.
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If you are missing some charts, it means you do not have the required sensor, or the app does not have enough data to estimate it. If your irregularity pie chart is missing, there are probably gaps in the graphs. You can consider Automatic tracking start or Sleep time estimation features, if you often forget to start the tracking. |