Hi there! I’m sorry to hear that you’re having trouble opening the Blue Letter Bible app on your iPhone. It can be really frustrating when apps don't function as expected. Let’s see if we can troubleshoot this together.

1. Force Close the App: First, try force closing the Blue Letter Bible app. To do this:
- Swipe up from the bottom of your screen (or double-click the Home button if your iPhone has one).
- Find the Blue Letter Bible app and swipe it up to close it.

2. Restart Your iPhone: Sometimes, a simple restart can resolve issues:
- Press and hold the power button until the “slide to power off” appears.
- Slide to turn off, and then power it back on after a few seconds.

3. Check for Updates: Make sure both your iPhone iOS and the Blue Letter Bible app are updated:
- Go to the App Store, tap on your profile icon at the top right, and check for any updates for the Blue Letter Bible app.

4. Disconnect from the Internet: Sometimes, disconnecting from the internet can help the app start:
- Go to Settings > Wi-Fi, and toggle it off.
- Open the Blue Letter Bible app again and see if it starts. If it does, you can reconnect to the internet after.

5. Reinstall the App: If none of the above steps work, you might consider deleting and reinstalling the app:
- Press and hold the Blue Letter Bible app icon until you see the option to delete it.
- Once deleted, go to the App Store and redownload it.

If you’re still having trouble after trying these steps, it might be helpful to check for specific online content issues that have been documented here or reach out directly through the app support page.

Are any of these steps helpful to you? Let me know how it goes!