Sleep score

1. What it does

Sleep score is a complete summary of your sleep health.

Sleep score draws a lot of inspiration from the Pittsburgh Sleep Quality Index.

2. Where to find it

  • on the Dashboard, one of the cards is a Sleep Score card.

  • in Left ☰ menu → Trend → Trend tab → Sleep score chart

3. How it looks like

sleepscore annotated
Figure 1. Your current sleep score. You get one point for each dimension that is in healthy range.
sleepscore
Figure 2. This is how Sleep score looks in Charts

3.1. Sleep score charts colors

We use green-ish for healthy range and red-ish for unfavourable range. The exact color may depend on the color palette.

Values above the average may mean some error of measurement – for example the phone was not close enough to the body. Values under average may indicate too much light sleep due to various factors such as stress, alcohol consumption, loud environment etc…

In long-term perspective, diversion from the average may indicate some issue. The Advice card on the main Dashboard from the Advice section will warn you, if the app detects any unfavourable trend in your data.

3.2. Sleep score dimensions

There are eight dimensions that contribute to sleep quality. Each of the dimensions has a healthy range and an unhealthy range:

Dimension Explanation Top figure Bottom figure Healthy / Unfavourable range
hrv pie

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
Unfavourable: under -5

BR pie

Breath disturbances

Breathing disturbance episodes per hour, read more about this topic here and here.

Average breathing disturbance episodes per hour.

Healthy: under 10
Unfavourable: over 20

irregularity pie

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
Unfavourable: over 1 hour

deepsleep pie

Deep Sleep

How long you’ve been in deep sleep compared to the total sleep duration.

Average % of deep sleep

Duration

Healthy: over 30%
Unfavourable: under 20%

duration pie

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
Unfavourable: less than 6.5 hours, or more than 8.5 hours

efficiency pie

Efficiency

How long you’ve been actually sleeping vs. being in bed.

Sleep/awake ratio in %

Average duration of awakes

Healthy: over 95%
Unfavourable: under 85%

rating pie

Rating

Your average subjective rating.

Your average rating

Max rating

Healthy: over 3.5 stars
Unfavourable: under 2 stars

snoring pie

Snoring

How long you’ve been snoring compared to the total sleep duration.

Average % of snoring

Total duration of snoring

Healthy: under 3%
Unfavourable: over 10%

Note

Healthy durations are adjusted according to your age as defined in Settings → Stats → Year of birth

  • General or not set (6.5 - 9)

  • School age (9 - 11)

  • Teenager (8 - 10),

  • Young (7 - 9)

  • Elderly (6 - 9)

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.

Note 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.