Hi, I see you're having trouble opening the iBIBLE app on your iPhone. Let's work through this together. Just to clarify, when you say "won't open," do you see the app icon respond when you tap it, or does it stay stuck on a loading screen, crash immediately, or simply do nothing at all? Knowing this will help me guide you better.

In the meantime, here are some general steps you can try on your iOS 18.3.1 device to get the app working again:

1. Force close and reopen the app:
- On your iPhone, swipe up from the bottom (or double-click the Home button if your iPhone has one) to open the app switcher.
- Find the iBIBLE app preview and swipe it upward to close it completely.
- Then, tap the app icon again to open it.

2. Restart your iPhone:
- Hold down the power button and either volume button until the "slide to power off" appears.
- Slide to power off, wait 30 seconds, then press the power button again to turn it back on.

3. Check for app update:
- Open the App Store.
- Tap your profile icon at the top right.
- Scroll down to see if iBIBLE has an update available. If yes, tap "Update."

4. Reinstall the app:
- Press and hold the iBIBLE app icon on your Home screen until options appear.
- Tap "Remove App" and confirm deleting it.
- Then go to the App Store and reinstall iBIBLE.
- Open the app and sign in again if needed.

These tend to fix most app-opening issues on iOS. Let me know what you observe after trying these or if you've already done any of these steps, so we can dig deeper if necessary!