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.

This article discusses the case where you have selected Pillow to be the one providing the sleep analysis.

Here are a few of the most common troubleshooting options:

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".

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.

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.

Pillow will periodically ask Apple Health for new health data from a variety of categories like heart rate, active energy, steps and more. On some occasions Apple Health might not return the requested data on time. This can happen in case either the iPhone or the Apple Watch are in low battery mode.

For Pillow 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 none of the above options work, don't hesitate to contact our support team to assist you.