Ashwin Lewis
Apple Watch users can track their sleep using the Sleep app. The watch can estimate the time spent in each sleep stage: REM, Core, and Deep sleep, as well as the number of times the wearer wakes up during the night. To use the sleep tracking feature, the watch needs to be charged to at least 30% before bed. The Sleep app can also be used to set up charging reminders. Sleep tracking is available on watchOS 8 or later, with watchOS 9 or later providing information about sleep stages.
| Characteristics | Values |
|---|---|
| Sleep tracking | Available on watchOS 8 or later |
| Sleep tracking stages | REM, Core, and Deep Sleep |
| Sleep tracking data | Time spent in each sleep stage, Sleep Duration, Sleep Trends, Sleep History, Sleep Goals, Sleep Schedules, Sleep Focus, Wind Down Time, Sleep Data, Respiratory Rate, Wrist Temperature |
| Sleep tracking apps | Sleep app, Health app |
| Sleep tracking requirements | Apple Watch Series 3 or later, Apple Watch paired with iPhone, Apple Watch charged to at least 30% before bed, snug fit |
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What You'll Learn
Apple Watch sleep tracking features
Apple Watch offers a range of sleep-tracking features to help you understand your sleep patterns and improve your sleep quality. Here are some key features:
Sleep Tracking:
With the Sleep app on your Apple Watch, you can track your sleep duration and sleep stages. The watch can estimate the time spent in each sleep stage: REM, Core, and Deep sleep. It also tracks when you wake up during the night. This information can be helpful if you have sleep disorders such as insomnia or sleep apnea. To enable sleep tracking, set up a sleep schedule on your iPhone by opening the Clock app and ensuring your sleep schedule is correct.
Sleep Schedules:
You can create personalized sleep schedules to help you meet your sleep goals and improve your overall health. Set a sleep goal, bedtime, and wake-up time. The Wind Down feature helps you establish a bedtime routine by reducing distractions and simplifying your Lock Screen. You can also enable Sleep Focus, which limits distractions before bed and protects your sleep.
Charging Reminders:
To ensure your Apple Watch has enough battery to track your sleep, you can set Charging Reminders. This feature will remind you to charge your watch before your Wind Down time. You can also set Sleep Reminders to alert you if it's getting late and you're not asleep yet.
Respiratory Rate Tracking:
With Apple Watch Series 3 or later with watchOS 8, you can track your respiratory rate while you sleep. This feature measures and records the number of times you breathe in a minute, providing insights into your overall health.
Sleep Data:
Upon waking up, you can view your recent sleep data on your Apple Watch or iPhone. The Sleep app on your watch will show your Sleep Stages data, Time Asleep, and Sleep Duration for the last 14 days. You can also open the Health app on your iPhone to see more detailed sleep data, including your average time spent in each sleep stage.
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How to enable sleep tracking
Sleep tracking is available on Apple Watch Series 3 or later with watchOS 8 or later. To enable sleep tracking, your Apple Watch must be charged to at least 30% before bed. You can set up charging reminders to remind you to charge your watch before your wind-down time.
To turn on sleep tracking, open the Apple Watch app on your iPhone, tap the 'My Watch' tab, then tap 'Sleep'. You can also create a sleep schedule by opening the Health app on your iPhone, tapping 'Browse', then tapping 'Sleep', and finally tapping 'Get Started' under 'Set Up Sleep'. From here, you can set up a sleep goal, bedtime and wake-up times, and Sleep Focus, which limits distractions before bed.
To get the most accurate results, make sure your Apple Watch fits comfortably on your wrist. If it is too loose, the accelerometer may register too much movement during your sleep. You can also track changes in your nightly wrist temperature with the Apple Watch.
After wearing your watch to bed, you can view your sleep data by opening the Sleep app on your watch and turning the Digital Crown to view your sleep stages, time asleep, and sleep duration for the last 14 days. You can also view your sleep history and respiratory rate data in the Health app on your iPhone.
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Sleep tracking accuracy
The Apple Watch can track your sleep and wake you up with an alarm. It can estimate the time spent in each sleep stage—REM, Core, and Deep—as well as the number of times you wake up during the night. To view your sleep data, open the Sleep app on your watch and turn the Digital Crown. You can also view your sleep data in the Health app on your iPhone.
To track your sleep, you need to wear your Apple Watch to bed for at least one hour. It is recommended that your watch is charged to at least 30% before you go to bed, and that it fits snugly on your wrist. If your watch is too loose, the accelerometer might register too much movement during your natural sleep, which could affect the accuracy of your sleep data.
The accuracy of the Apple Watch's sleep tracking has been called into question by some users, who claim that the data does not always match their experience of sleep. However, others have found that the data matches their experience. One study found that the Apple Watch was the best performer when compared to 36 other devices, with an accuracy of around 85% for deep sleep and less for REM sleep. It is important to note that no app or watch can accurately measure sleep stages without tracking brainwaves, and the data provided is an estimate based on movement and breathing rate.
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Sleep tracking with a dead battery
The Apple Watch can track your sleep stages, including REM, Core, and Deep sleep, as well as your respiratory rate and sleep duration. However, this feature relies on the watch's battery being sufficiently charged to last through the night.
If your Apple Watch battery dies during the night, it will not be able to track your sleep data for that night. To prevent this, it is recommended to ensure your watch is charged to at least 30% before going to bed with Sleep Tracking enabled. You can also set up Charging Reminders, which will remind you to charge your watch before your wind-down time.
Additionally, you can maximize the battery life of your Apple Watch by being strategic about charging times. For example, charging the watch while you're in the shower or during your wind-down time before bed can help ensure it has enough battery life to last through the night.
If your watch does die during the night, you may still be able to access some sleep data. In some cases, the watch may be able to estimate your wake-up time even if it died during the night, as seen in one user's experience. However, this data should be viewed with some skepticism, as the accuracy may vary.
To view your sleep data, you can open the Sleep app on your watch and turn the Digital Crown to view your Sleep Stages data, Time Asleep, and Sleep Duration for the last 14 days. You can also access your sleep history by opening the Health app on your iPhone or iPad and tapping on Browse > Sleep.
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Sleep tracking with iPhone
Sleep tracking is an important feature for many people, and Apple has developed several tools to help you understand your sleep patterns and habits. You can track your sleep using an Apple Watch, or directly with your iPhone.
Sleep Tracking with Apple Watch
The Apple Watch uses its Sleep app to track your sleep. The watch needs to be charged to at least 30% before bed, and you need to wear it for at least one hour while sleeping. The watch can then estimate the time spent in each sleep stage: REM, Core, and Deep sleep, as well as your Sleep Duration and Respiratory Rate. The Sleep app can also be used to set up reminders for charging your watch.
You can also track your sleep using just your iPhone. The built-in Health app on your iPhone can be used to track your sleep without the need for additional devices. The app uses your iPhone's motion sensors and accelerometer to analyse your movement patterns during sleep. It can detect when you fall asleep, wake up, and transition between sleep stages. When setting up sleep tracking, you input your typical bedtime and wake-up time, which helps the app gauge your sleep duration and schedule. The app also considers contextual cues, such as your device usage patterns and bedtime routine, to refine its understanding of your sleep habits.
Comparison
While both methods offer sleep tracking, the Apple Watch provides more detailed insights into your sleep stages and respiratory rate. However, the iPhone's Health app can still provide valuable data on your sleep habits and patterns, especially if you do not have access to an Apple Watch.
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Frequently asked questions
Apple Watches with watchOS 8 or later can track sleep stages.
First, ensure your Apple Watch is charged to at least 30% before bed with Sleep Tracking enabled. Then, wear your Apple Watch to bed for at least 1 hour. In the morning, open the Sleep app on your watch and turn the Digital Crown to view your Sleep Stages data, Time Asleep, and Sleep Duration for the last 14 days.
The Apple Watch can estimate the time spent in each sleep stage: REM, Core, and Deep. It also tracks when you wake up and your Respiratory Rate.
You can view your sleep data on your Apple Watch by opening the Sleep app and turning the Digital Crown. You can also view your sleep data on your iPhone by opening the Health app and tapping Browse, then Sleep.
