Hi there! I understand you're encountering a white screen issue with the GoTo app on your iPhone running iOS 18.7. To get started, could you tell me if the white screen appears as soon as you open the app, or does it happen after you try to log in or join a session? Also, have you made any recent updates to the app or your device?

Meanwhile, I can suggest some initial steps that often help fix this kind of issue:

1. Force Close and Reopen the App
Double tap the Home button or swipe up from the bottom (depending on your iPhone model) to bring up the app switcher, then swipe the GoTo app off the screen to close it completely. After that, reopen it.

2. Toggle Airplane Mode
Turn on Airplane mode on your iPhone, wait about 10 seconds, then turn it off. This refreshes the network connection and can sometimes clear up loading problems.

3. Check for App and iOS Updates
Go to the App Store and check if there's an update for the GoTo app. Also, verify if your device is fully updated via Settings > General > Software Update.

4. Restart Your iPhone
Sometimes a simple restart clears temporary glitches.

If these don’t help, the issue might relate to either cached data or possible interference from security settings.

Next, here are some more specific steps:

5. Clear App Cache (if possible)
While iOS apps don’t usually have a dedicated cache clear button, deleting and reinstalling the GoTo app can serve the same function.

6. Reinstall the GoTo App
Delete the app by pressing and holding its icon then tapping "Remove App". Then, redownload it from the App Store.

7. Check for Antivirus or Security Restrictions
If you use any security or VPN apps, try temporarily disabling them to see if that resolves the white screen.

If after trying all these your screen remains white, let me know. We can dive into advanced troubleshooting or check for any ongoing server-side issues.

You can also consult the official GoTo support for a detailed guide here: Fix a blank white screen on the mobile app 1.

Let me know how these steps work for you! Are you satisfied with this initial guidance?