Hi! I understand you’re having trouble with no sound from the ShutEye app on your iPhone running iOS 18.4.1. I’d be happy to help get that sorted out for you.

To get started, could you please share a bit more? For example:
- Is the app showing that something is playing but you just don’t hear anything?
- Have you checked if your iPhone’s volume is turned up or if it’s on silent mode?
- Does the issue happen with all sounds in the app or just specific ones?
- Have you tried restarting the app or your phone yet?

Meanwhile, here’s a quick step-by-step to try:

1. Check Volume and Silent Mode:
- Make sure your iPhone’s side switch is not set to silent.
- Press the volume up button a few times to raise the sound level.
- Open Control Center (swipe down from the top right) and confirm that volume is up.

2. Restart ShutEye App:
- Swipe up from the bottom of the screen and pause to see open apps.
- Swipe the ShutEye app off the screen to close it.
- Reopen the app and try playing sound again.

3. Restart Your iPhone:
- Press and hold the side button and either volume button until the power off slider appears.
- Slide to power off, wait 30 seconds, then turn it back on.

4. Update the App:
- Open the App Store, tap your profile icon top right.
- Scroll to see if ShutEye has an available update. If yes, tap Update.

5. Check App Permissions:
- Go to Settings > ShutEye and ensure microphone and other necessary permissions are enabled.

If you’ve done any of these or the problem persists, let me know exactly what you’ve tried and we can look at some deeper troubleshooting or check for app issues.

Are you able to test these steps and share what happens?