Hi there! It sounds like you're experiencing a black screen when trying to use the SmartNews app on your iPhone. Let’s work together to resolve this issue.

To start off, I’d like to clarify a few details:

1. Have you noticed if this occurs every time you open the app, or is it intermittent?
2. Have you tried any troubleshooting steps already, such as restarting your device or checking your internet connection?

Once I have a bit more information, I can better guide you through a solution! Meanwhile, here’s a basic troubleshooting step you can try:

1. Restart Your iPhone: Sometimes, a simple restart can clear temporary issues. Just hold down the power button and slide to power off, then turn it back on.

If that doesn't help, we can try uninstalling and then reinstalling the app. Here's how you can do that:

1. Press and hold the SmartNews app icon until it starts to jiggle.
2. Tap the 'X' that appears on the corner of the app icon to delete it.
3. Go to the App Store, search for SmartNews, and download it again.

Give these steps a try, and let me know how it goes!