Track your Sleep breathing quality with the Google Health app

While asleep, your device uses the heart rate and motion sensors to continuously track whether you are experiencing potential breathing disturbances, based on your blood oxygen levels. Each morning, you'll see how much of your sleep was spent in optimal breathing.

Over time, those insights come together into a monthly assessment that helps you recognize longer-term patterns and adjust your sleep environment and daily habits. You can check your Sleep breathing quality summary through the Today tab, Sleep tab, or Health tab.

1. Open the Google Health app 
2. On the Today tab , tap Sleep duration.
3. Scroll to "More about your sleep” and tap Breathing quality.

To access your summary through the Sleep tab:

1. Open the Google Health app  and tap the Sleep tab .
2. Tap Sleep quality.
3. Scroll to "More about your sleep," and tap Breathing quality.

1. Open the Google Health app  and tap the Sleep tab .
2. Tap Sleep quality.
3. Scroll to "More about your sleep," and tap Breathing quality.
4. To check your trends over time, tap See weekly trends. You can change between:
   • D: Your sleep trends over the past day.
   • W: Your breathing quality over this week.
   • M: Your breathing quality over this month.
   • 3M: Your breathing quality over the past 3 months.
   • Y: Your breathing quality over the past year.

Tip: Monthly reports are generated at the end of each calendar month, summarizing your overall breathing quality patterns and highlighting long-term trends.

How are breathing rate, blood oxygen, and sleep breathing quality related?

• Breathing rate: The average count of how many breaths you take each minute while sleeping, showing your body's usual pace.
• Blood oxygen: An estimate of how much of your oxygen-carrying capacity is being used, based on the percentage of hemoglobin that’s carrying oxygen.
• Sleep breathing quality: Measures the effectiveness of your sleep breathing by tracking fluctuations in your blood oxygen levels.

While breathing rate captures the speed of your breathing rhythm and blood oxygen estimates how much oxygen your blood had carried on average, breathing quality evaluates how smooth and uninterrupted your sleep breathing rhythm was to support your blood oxygen levels.

Your sleep breathing quality is rated based on how much of your sleep had signs of optimal breathing quality. This allows you to track patterns and see how changes in your daily habits impact your sleep breathing quality over time.

• High (94%+): Almost all of your sleep had signs of “good” breathing quality, supporting your body's ability to fully recover.
• Medium (83% to 93.9%): Breathing was steady for much of the night, but lower than preferred, somewhat limiting the quality of sleep.
• Low (66% to 82.9%): A reduced amount of your sleep had signs of “good” breathing quality, which can impact your daytime energy levels.
• Very low (Under 66%): The amount of “good” breathing quality was quite limited, which might lead to feeling tired or unrefreshed.

At the end of each month, you will get an assessment of your sleep breathing quality based on the amount of days with different levels of sleep breathing quality. Your data can be sorted into one of 4 categories:

• Mostly optimal: For most of the days with usable sleep data, your breathing was steady and calm almost all of your sleep with very few changes.
• Sometimes optimal: There was a mix of days with optimal and suboptimal sleep breathing quality from the days with valid sleep data.
• Rarely optimal: A substantial amount of days had suboptimal sleep breathing quality.
• Not enough data: There weren't enough sleep periods with usable data recorded to give you an assessment. This can happen when any sleep period has less than 3 hours of sleep with good signal quality. If fewer than 7 days of usable sleep data are available for any month, then an assessment will not be generated, because too little data causes the algorithm to have low confidence in the assessment.

On your Sleep breathing quality summary, you can find out how it is trending when you tap View trends.

Your Sleep breathing quality measures how steady your breathing patterns are while you sleep. Factors like your sleeping position, bedroom environment, device fit, and daily health habits can all affect this score.

What causes breathing difficulties during sleep?

Many everyday factors can affect your ability to breathe effortlessly throughout your sleep. Some common reasons include your body or head position, nasal congestion, air quality, what you eat or drink before bed, and potentially clinical issues like sleep breathing disorders.

What should I do if my breathing quality isn’t high?

If your sleep breathing quality is below the optimal range, consider what might have affected your breathing. Sometimes, simple lifestyle adjustments, like sleeping on your side or limiting alcohol intake might help.

While occasional drops in sleep breathing quality may happen for various reasons, if you’re concerned about ongoing reduced breathing quality while you sleep or you feel like you’re not able to achieve your health goals through lifestyle modifications, you may want to consult a healthcare professional for advice.

Sleep breathing quality is missing

If your Sleep breathing quality isn’t showing up in your summary, Google Health may not have recorded enough continuous data during a specific sleep period.

Why is my Sleep Score high if my breathing quality is low?

You may fall asleep readily and have a long, uninterrupted sleep, earning a high Sleep Score. However, subtle breathing disruptions can still occur throughout your sleep without physically waking you up or showing up as restlessness.