Hi there! I understand you're seeing just a blank screen when you open the Wim Hof Method app on your iPhone with iOS 18.7. Let's get this sorted out together.

To start, can you tell me if you have already tried closing the app completely and reopening it? Also, have you tried pulling down on the screen to refresh? Sometimes that can fix the blank screen issue quickly.

Meanwhile, here's a step-by-step approach we can try to resolve this:

1. Force Close and Reopen the App
Swipe up from the bottom and pause (or double-click Home button) to bring up the app switcher. Find the Wim Hof app and swipe it off the screen to close it completely. Then, open the app again.

2. Pull to Refresh
If the app opens to a blank screen again, try pulling down on the bottom half of the screen to refresh the content. This has helped other users experiencing similar issues.

3. Restart Your iPhone
Sometimes a device restart clears temporary glitches: press and hold the side button and either volume button, then slide to power off. After it turns off, turn it back on and try the app again.

4. Check for App Updates
Open the App Store, tap on your profile icon at the top right, and scroll to see if there's an update available for the Wim Hof Method app. Installing the latest version can fix bugs.

5. Reinstall the App
If none of the above work, you can uninstall the app by pressing and holding its icon, then select "Remove App" → "Delete App." Then reinstall it from the App Store.

Does any of this sound like what you've tried already? If so, I can guide you through some deeper troubleshooting or check if there might be any server issues on our side.

Let me know how it goes!