Hi there! I see you're having trouble with the Netvue app not opening and connecting on your iPhone with iOS 18.6. Let’s get this sorted out.

To make sure I understand correctly—when you try to open the Netvue app, it either crashes immediately or just doesn’t respond? Also, have you been able to use the app successfully before, or is this a new problem since a particular event (like an app update or iOS update)?

In the meantime, here’s a step-by-step approach that often helps with connection issues and app launch problems on iOS:

1. Close and Reopen the App: Double-click the Home button or swipe up from the bottom of the screen to see your recent apps, then swipe the Netvue app off the screen to close it. Then open it again.

2. Restart Your iPhone: Power off your device completely, wait 30 seconds, then turn it back on.

3. Check for App Updates: Open the App Store, tap your profile icon at the top right, and scroll down to see if there is an update available for the Netvue app. If yes, update it.

4. Reinstall the App: If it still won’t open, try uninstalling the Netvue app by pressing and holding its icon, tapping "Remove App", then reinstall it from the App Store.

5. Check Network Connection: Since the app connects to your camera via Wi-Fi, ensure your iPhone is connected to a stable Wi-Fi network, preferably 2.4 GHz since Netvue devices often require that frequency.

6. Verify Netvue Server Status: There was a recent cloud server outage affecting Netvue’s services, which caused login and in-app access issues. The company has released updates addressing these problems. So, make sure your app is updated to the latest version because the issue might be server-side and fixed by the update1.

Please try these, and let me know where you get stuck or if any error messages appear. I’m here to help! Are you satisfied with the steps so far?