⚠️ Important note:
Starting with watchOS 9, Apple Health can detect sleep and provide sleep stage analysis. Pillow offers the option to switch between the analysis provided by Pillow and the one provided by Apple Health.
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This article discusses the case where Pillow has been configured to import sleep sessions from Apple Health, and Pillow does not display any sessions.
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​Here are a few of the most common troubleshooting options:

Retrieving sleep stage analysis from Apple Health requires watchOS 9 or newer.
To check your watchOS version:
1. Open the "Settings" app on your Apple Watch.
2. Go to "General" > "About".
3. Check the value that appears under "Version."
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Due to iOS issues that are not caused by Pillow, Apple Health permissions might reset after an update.
To make sure Pillow has been given the required permissions:
1. Open the "Health" app.
2. Tap on the profile icon, in the top right corner.
3. Go to "Apps" > Pillow > Make sure all categories are turned ON and specifically that Pillow has both "Read "and "Write" permission for the "Sleep" category.
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​Note:
On some rare occasions, the permissions might be turned OFF right after turning them ON due to known iOS issues. Please ensure that permissions remain turned ON. If they are turned off, please restart your devices and try again.
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Pillow will ask Apple Health periodically for new stage data. On some occasions, Apple Health might not detect any sleep, or the sleep stage data is not available yet. This can happen in the middle of a sleep session or after waking up. Our recommendation is to wait and check back again later.
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For Apple Health to produce a sleep stage analysis, you must wear your Apple Watch during sleep. Please make sure that your Apple Watch remains positioned on top of your wrist during sleep. If you wear a loose Apple Watch band, the sensors might not be able to register data properly.

If the issue persists, try restarting both devices.

If Apple Health fails to produce a sleep analysis or the sleep analysis produced is unsatisfactory, you can always switch back to Pillow's sleep stage analysis.
To do so:
1. Open Pillow.
2. Tap on the "Settings" icon in the top right corner.
3. Go to the "Sleep Tracking" section.
4. Tap on "Sleep Stage Data".
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If none of the above options work, don't hesitate to contact our support team to assist you.