Hello! It sounds like you're experiencing a black screen issue with the Wellsite Navigator app on your iPhone. I’m here to help you troubleshoot this.

First, can you confirm if the black screen appears when you open the app, or does it happen only when you try to access certain features? Additionally, please let me know if you’ve noticed any patterns or if it started happening after a particular update or event.

In the meantime, here are some general troubleshooting steps you can try:

1. Restart the App: Close the Wellsite Navigator app completely and then reopen it. To close the app, swipe up from the bottom of the screen and swipe the Wellsite Navigator app off the screen.

2. Check for Updates: Ensure that both your iOS and the Wellsite Navigator app are updated to the latest versions. You can check for updates in the App Store.

3. Clear the App Cache: Sometimes, cached data can cause issues. Try uninstalling the app and then reinstalling it from the App Store.

4. Reset Network Settings: Sometimes, connection issues can affect the app's performance. Go to Settings > General > Reset > Reset Network Settings. Note that this will reset all your Wi-Fi networks and passwords.

5. Reboot Your iPhone: A simple reboot can often resolve many issues. Just power off your device and turn it back on.

If none of these steps work, please let me know, and we can dive deeper to find a solution.