Hi there! I’m Henry Adams, and I’d like to help get your Sleep app up and running again on your iPhone. To start, could you tell me a little more about what you mean by “Sleep stopped working”? For example, is the app not opening at all, not tracking your sleep, not syncing data, or showing some kind of error message? Any details you can provide will help me guide you better.

Sleep so indicates “today’s sleep data not yet available” each day since Tuesday

Thanks for the additional info! Since your Sleep app on your iPhone with iOS 18.7 is showing "today’s sleep data not yet available" starting from Tuesday, let's try a few things to fix this:

1. Check Health Access Permissions:
Sleep data often relies on the Health app for data integration. Go to your iPhone’s Settings > Privacy > Health > Sleep and make sure the Sleep app has permissions enabled to read and write data.

2. Confirm Sleep Settings in the Sleep App:
Open the Sleep app and check that your sleep schedule and tracking settings are correctly configured. Sometimes, updating iOS versions can affect these settings.

3. Restart your iPhone:
A quick restart can resolve temporary glitches. Hold the side button and either volume button, then slide to power off. Turn the phone back on after about 30 seconds.

4. Ensure Background App Refresh is Enabled:
Go to Settings > General > Background App Refresh and confirm that it is turned on for the Sleep app. This ensures the app can update sleep data even when not actively open.

5. Update the Sleep app:
Check the App Store for any available updates for the Sleep app, as developers may have issued fixes for iOS 18 compatibility.

6. Check for iOS Updates:
Sometimes Apple releases quick bug fixes after a major update like 18.7. Go to Settings > General > Software Update to make sure you have the latest patches.

7. Review if iPhone-only Sleep Tracking has Changed:
There are reports that after iOS 18, iPhone-only sleep tracking (without an Apple Watch or third-party device) has some functionality alterations. If you are tracking sleep purely via iPhone sensors, this might be part of the issue. You might want to look into connecting an Apple Watch or compatible tracker if available2.

If after these steps the error persists, could you let me know if you’re using any accessories (like an Apple Watch) to track sleep, or just the iPhone itself? That way, I can suggest more tailored troubleshooting.

Are you comfortable trying these steps? I can walk you through any of them.