Hi there! I understand your Myzone app on your iPhone running iOS 18.7 is crashing and won't stay open. Let's see if we can get that sorted out together.

To start, could you tell me if you've already tried closing the app completely and reopening it? Also, have you restarted your iPhone recently? These are helpful first steps to clear minor glitches.

Here’s a step-by-step approach we can take:

1. Force Close the Myzone App: Double-tap the Home button (or swipe up from the bottom if your iPhone doesn't have a Home button) to bring up app previews. Find the Myzone app and swipe it up to close it completely.

2. Restart Your iPhone: Press and hold the side button and volume up (or down) until the power off slider appears. Slide to power off, wait about 30 seconds, then press and hold the side button to turn it back on.

3. Check for App Updates: Open the App Store, tap your profile icon, and scroll to see if Myzone has an update pending. If yes, update it.

4. Check for iOS Updates: Go to Settings > General > Software Update. If an update is available, install it. Sometimes app crashes happen if the OS and app versions aren’t compatible.

5. Reinstall the Myzone App: If the app continues to crash after updates, try deleting it and reinstalling from the App Store. This can clear corrupted files.

6. Verify Account and Device Status: Open the app after reinstalling and confirm your MZ-Open device is added under "Your Devices" and your subscription is active via Help > Support in the app.

Please try these steps if you haven’t yet, and let me know which ones you've done or if the crash behavior changes at all. There might also be occasional system-wide issues from Myzone’s servers, but we’ll cross that bridge if needed.

Are you comfortable trying these steps? I’m here to help guide you through any of them!

App on iPhone will not stay open