Hi there! I see you're experiencing the Vita Mahjong app locking up or freezing on your iPhone running iOS 18.7. Let's get this sorted out together. Could you tell me a bit more about when the lockups happen? For example, does it freeze right on startup, during gameplay, or when you do something specific like watching ads or making a move?

While you provide that, I’ll suggest some quick checks we can do to see if we can fix this smoothly. Here’s a straightforward plan:

1. Restart the App and Your iPhone
- Close Vita Mahjong completely by swiping it away from your app switcher.
- Restart your iPhone (hold the side button and volume button, then slide to power off).
- Turn it back on and reopen the app. This simple step clears temporary glitches.

2. Check for App Updates
- Open the App Store and tap your profile at the top right.
- Scroll to see if there’s an update available for Vita Mahjong and install if yes. Updates often provide fixes for freezing issues.

3. Check Your Internet Connection
- Make sure you have a stable Wi-Fi or cellular connection.
- Try switching between Wi-Fi and cellular to see if the freezing persists.

4. Free Up Some Storage and Close Background Apps
- Sometimes low storage or having many apps open can cause freezes.
- Go to Settings > General > iPhone Storage to check free space.
- Also, close other unused apps running in the background.

5. Clear App Cache (if possible)
- On iOS, clearing cache often involves uninstalling and reinstalling the app because there’s no direct cache clear option like Android.
- If convenient, you might delete Vita Mahjong (hold the app icon > Remove App > Delete App) and then reinstall it from the App Store.

If you've already tried any of these, let me know which ones, and we can go deeper into troubleshooting or check for other causes like account or server issues. Also, I’m here to guide you through any step.

Are you able to try these steps? Let me know how it goes!