Colin Snow
Apple Watch users can track their sleep using the Sleep app. The watch uses your movement and phone use to detect whether you're sleeping and estimates the time spent in each sleep stage, including REM, core, and deep sleep. To use the sleep tracking feature, users must wear their watch to bed for at least an hour each night and ensure it is charged to at least 30% before sleep. While the Sleep app is available on Apple Watches, there is no dedicated Sleep app on the iPhone; instead, the sleep functions are part of the Health app.
| Characteristics | Values |
|---|---|
| Devices | Apple Watch Series 3 or later, iPhone |
| Operating System | watchOS 8 or later |
| Apps | Health, Sleep |
| Features | Sleep tracking, sleep schedules, sleep goals, sleep trends, sleep data, sleep history, sleep stages, sleep focus, charging reminders, respiratory rate tracking, heart rate tracking |
| Limitations | Battery life, accuracy of sleep stages |
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What You'll Learn
How to set up sleep tracking on Apple Watch
Sleep tracking is available on watchOS 8 or later. To set up sleep tracking on your Apple Watch, you'll need to make sure your watch is charged to at least 30% before you go to bed. You can then follow these steps:
On your iPhone:
- Open the Health app.
- Tap 'Browse' at the bottom of the screen.
- Tap 'Sleep'.
- Tap 'Get Started' under 'Set Up Sleep'.
- Tap 'Next'.
- Set your sleep goals, including the number of hours you'd like to sleep and your bedtime and wake-up times.
- Decide whether to turn on Sleep Focus to reduce distractions before bed and during sleep.
- Adjust your wind-down time and sleep goal as needed.
- Tap 'Full Schedule & Options'.
- Tap 'Wind Down' or 'Sleep Goal' under 'Additional Details'.
- Adjust your time, then tap 'Wind Down' or 'Sleep Goal' to save your changes.
- Open the Sleep app.
- Tap the sleep-alarm-icon in the upper left.
- Tap 'Wind Down' or 'Sleep Goal' under 'Options'.
- Tap the plus and minus buttons to adjust your time.
- Tap the left arrow in the upper left to go back and save your changes.
On your Apple Watch:
- Go to the Settings app.
- Set up your Sleep Focus, which is optional but gives you access to specialised home screens and notification settings that will turn on at bedtime.
- Open the Sleep app on your Apple Watch.
- Follow the on-screen instructions.
- Set up your sleep schedule.
- Tap your schedule, then tap 'Wake Up' or 'Bedtime'.
- Turn the Digital Crown to set a new time, then tap.
- Set your alarm options: tap your schedule, then turn the alarm on or off, and tap 'Sound & Haptics' to choose an alarm sound.
- Make sure your Apple Watch is set to a comfortable fit.
- Wear your Apple Watch to bed.
- If you have a passcode, make sure wrist detection is turned on.
- In the morning, check your remaining battery charge.
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How to view sleep data on Apple Watch
To view your sleep data on your Apple Watch, you will need to make sure that sleep tracking is enabled. To do this, open the Apple Watch app on your iPhone, tap 'My Watch', then tap 'Sleep'. Here, you can turn Sleep Tracking and Charging Reminders on or off. When Sleep Tracking is on, your Apple Watch will track your sleep and add sleep data to the Health app on your iPhone.
You can also set up sleep tracking on your Apple Watch by going to the Sleep app on your watch. Follow the onscreen instructions. You can also open the Health app on your iPhone, tap 'Browse', tap 'Sleep', then tap 'Get Started' (below Set Up Sleep). Go to the Sleep app on your Apple Watch.
To view your sleep data, open the Sleep app on your Apple Watch, then turn the Digital Crown to view your Sleep Stages data, Time Asleep, and your Sleep Duration for the last 14 days. You can also ask Siri "How much did I sleep last night?" on supported models.
To view your sleep history, open the Health app on your iPhone or iPad. If you're on your iPhone, tap ''Browse' at the bottom of the screen. If you're on your iPad, tap the sidebar to open it. Tap 'Sleep'. If you have Sleep saved as a favorite, you can access it from the Summary page in the Health app. The bar graph is set to 'D' for daily by default. Tap 'W' at the top of the chart to view your sleep history for the past week, 'M' for the past month, or '6M' for the past 6 months. Tap ''Show More Sleep Data' and select a category to review additional sleep details.
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How to set sleep goals on Apple Watch
Apple Watch users can track their sleep using the Sleep app. The watch uses your motion to detect sleep when worn to bed. It can also track your breathing rate as you sleep, which can give you insights into your overall health.
To set up sleep tracking, you must first enable the feature on your Apple Watch. Here are the steps to follow:
Setting Up Sleep Tracking:
- Ensure your Apple Watch is paired with your iPhone. If you have already completed Sleep setup, open the Watch app on your iPhone, tap the 'My Watch' tab, then tap 'Sleep'.
- Tap 'Track Sleep with Apple Watch' to turn on the setting.
- Turn on Charging Reminders to receive notifications reminding you to charge your watch before your wind-down time.
- Make sure your Apple Watch is charged to at least 30% before bed with Sleep Tracking enabled.
Setting Sleep Goals:
You can set a sleep goal and create a customised sleep schedule using the Health app on your iPhone. Here's how:
- Open the Health app on your iPhone.
- Tap 'Browse' at the bottom of the screen.
- Tap 'Sleep'.
- Tap 'Get Started' under 'Set Up Sleep', then tap 'Next'.
- Set your Sleep Goal by inputting the number of hours you'd like to sleep.
- Adjust your bedtime and wake-up times to align with your sleep goal.
- You can also enable Sleep Focus to reduce distractions on your iPhone and Apple Watch before bedtime.
You can also adjust your sleep goal and schedule directly on your Apple Watch. Here's how:
- Press the Digital Crown on your Apple Watch to open the App View.
- Launch the Sleep app.
- Tap 'Full Schedule'.
- Tap 'Sleep Goal' and use the plus and minus buttons to adjust the amount of time you'd like to sleep.
- After adjusting your Sleep Goal, you can change your bedtime and wake-up times in your Sleep Schedule to ensure you're meeting your goal.
By following these steps, you can effectively set up sleep tracking and customise your sleep goals on your Apple Watch and iPhone.
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How to charge Apple Watch for sleep tracking
Sleep tracking is available on Apple Watch Series 3 or later with watchOS 8 or later. To use sleep tracking, your Apple Watch must be enabled and worn for at least 1 hour each night. It is recommended that your Apple Watch is charged to at least 30% before bed. If your Apple Watch is charged less than 30% before you go to bed, you will be prompted to charge it.
To ensure your Apple Watch is charged adequately for sleep tracking, it is recommended to devote 60 to 90 minutes every evening before bed to charge your watch. For example, if your bedtime is 10 pm, you should start charging your Apple Watch at 8:30 or 9 pm. Alternatively, you can charge your watch for 30-45 minutes in the morning while getting ready or showering and for another 30-45 minutes in the evening before bedtime.
According to Apple, it takes 90 minutes to charge an Apple Watch battery from 0% to 80%. You can expect about 18 hours of Apple Watch battery life with typical use.
Some users have multiple Apple Watches, using one for sleep tracking and another for daily use. This ensures that the watch used for sleep tracking is always charged and ready for bedtime.
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How accurate is Apple Watch sleep tracking?
Apple Watch users can track their sleep using the Sleep app. The watch uses motion to detect sleep when worn to bed, and it can estimate the time spent in each sleep stage, including REM, Core, and Deep sleep. It can also track your breathing rate while you sleep, which can provide insights into your overall health. However, the accuracy of sleep tracking on the Apple Watch has been questioned by some users, with reports of inconsistent results when compared to other sleep tracking apps or devices.
To ensure the most accurate results when using the Apple Watch to track sleep, it is recommended to have the watch charged to at least 30% before bed and to wear it for at least one hour. The watch will automatically measure and record the number of times you breathe in a minute, and this data can be viewed in the Health app on a connected iPhone or iPad. The Sleep app on the Apple Watch also allows users to create sleep schedules and set sleep goals to help improve sleep habits.
While the Apple Watch provides insights into sleep patterns and durations, it is important to note that it may not be as accurate as medical-grade devices. Some users have reported discrepancies in the data, especially when comparing the Apple Watch with other sleep tracking apps or devices. For example, some users have noted that the Apple Watch reported significantly lower deep sleep durations compared to other apps, raising questions about the accuracy of the measurements.
Despite these inconsistencies, studies have shown that the Apple Watch performs relatively well when compared to other consumer sleep trackers (CSTs). In a multicenter validation study, the Apple Watch 8 was found to have an accuracy of about 85% for deep sleep detection and slightly lower for REM sleep detection. This study also highlighted the influence of sensor types and algorithms on the accuracy of sleep tracking, suggesting that movement information alone may not be sufficient for precise sleep stage determination.
To conclude, while the Apple Watch sleep tracking feature can provide valuable insights into your sleep habits, it may not always deliver perfectly accurate results. Users should consider the trends and patterns in their sleep data over time rather than focusing solely on the exact values. Additionally, following the recommended guidelines, such as ensuring sufficient charge and wear time, can help improve the accuracy of sleep tracking on the Apple Watch.
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Frequently asked questions
To set up sleep tracking, you need to enable "Track Sleep with Apple Watch" in the Watch app on your iPhone. You can also set up a sleep schedule and sleep goals in the Health app on your iPhone or the Sleep app on your Apple Watch. Make sure your Apple Watch is charged to at least 30% before bed.
You can view your sleep data in the Sleep app on your Apple Watch or the Health app on your iPhone. In the Sleep app, you can see the amount of sleep you got, the time spent in each sleep stage, and your sleep average over the last 14 days. In the Health app, you can view your sleep history and more detailed sleep data.
The Apple Watch can estimate the time spent in different sleep stages, including REM sleep, core sleep, and deep sleep. It also shows the time you were awake.
Yes, the Apple Watch can track your respiratory rate while you sleep. This data can be viewed in the Health app on your iPhone by tapping on "Respiratory" and then "Respiratory Rate".
