Hello! I’m Pierre, here to help you with your HKTVmall app on your iPhone running iOS 18.5. Let’s get this sorted out.

To start, could you please tell me a bit more about what’s happening? For example:
- Is the app not opening at all?
- Is it crashing or freezing?
- Are you having trouble logging in or using specific features?
- Do you see any error messages?

Knowing this will help me guide you more precisely.

While I wait for your details, here are some simple, common steps to try:

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

2. Restart Your iPhone
- Press and hold the side button and either volume button until the power off slider appears.
- Slide to power off, wait a few seconds, then turn it back on by holding the side button.

3. Check for App Updates
- Open the App Store, tap your profile icon, and scroll to see if HKTVmall has an update. Installing the latest version can fix bugs.

4. Check Internet Connection
- Ensure you have a stable Wi-Fi or cellular connection.

If these don’t solve the issue, let me know what happened when you tried them, and what specific problem you’re encountering. I’ll guide you through more advanced steps next!