Hi! I see you're experiencing a black screen when launching the Sleep Number app on your iPhone. Let's work together to get this sorted out.

To start, could you tell me if the app was recently updated before this issue began? Also, have you tried logging out and back into the app or restarting your phone? These are simple steps that sometimes resolve this kind of problem.

Meanwhile, here are some steps you can try:

1. Force close and reopen the app: Swipe up from the bottom of your screen and pause, then swipe the Sleep Number app off the screen to close it. Then tap the app icon to open it again.

2. Restart your iPhone: Sometimes a quick reboot can clear up temporary glitches.

3. Check for app updates: Go to the App Store, tap your profile icon, and see if there’s an update available for the Sleep Number app. Updating can fix bugs that cause black screens.

4. Log out and log back in: If the app opens enough for you to reach the login screen, try logging out and then logging back in.

5. Reinstall the app: Delete the Sleep Number app, then reinstall it from the App Store. This can clear corrupted files.

If these don’t help, it might be related to your bed’s connection or a server-side issue affecting the app. In that case, performing a power cycle on your bed and your Wi-Fi router can help:

- Unplug your bed’s power cord for about 60 seconds, then plug it back in.
- Do the same with your router/modem.

After that, try the app again.

Please let me know if you have tried any of these already or if you need help with any step. Once we confirm some more details, we can explore further solutions if needed.

Are you able to access any part of the app when it opens, or is it completely black right from the start?