If the MerlMovie app is not working, you can follow these step-by-step troubleshooting steps to resolve the issue:

1. Check for App Updates:
- Go to the App Store on your iPhone.
- Tap on your profile icon in the top right corner.
- Scroll down to find the MerlMovie app and check if there's an update available. If there is, tap Update.

2. Restart the App:
- Close the MerlMovie app completely. You can do this by swiping up from the bottom of the screen (or double-clicking the Home button) and swiping up on the app to close it.
- Reopen the app to see if it functions correctly.

3. Restart Your iPhone:
- Press and hold the power button until you see “slide to power off.”
- Slide to turn off your iPhone. Once it’s off, press and hold the power button again until you see the Apple logo. This can help clear temporary glitches.

4. Check Network Connection:
- Make sure your iPhone is connected to a Wi-Fi network or is using cellular data.
- Try switching between Wi-Fi and cellular to see if there’s a connection issue.

5. Clear Cache/Data:
- Unlike Android, iOS doesn’t allow you to clear app cache directly. However, uninstalling the app can help:
- Press and hold the MerlMovie app icon until it wiggles.
- Tap the 'X' to delete the app.
- Reinstall it from the App Store.

6. Check for iOS Updates:
- Go to Settings > General > Software Update.
- If there’s an update available, download and install it. Compatibility issues with the app might cause it not to work on older iOS versions.

7. Reinstall the App:
- If none of the above steps work, uninstall the MerlMovie app and reinstall it:
- Follow the same steps to delete the app as mentioned above.
- Download it again from the App Store.

8. Contact Support:
- If the app still does not work after trying all the above steps, consider reaching out to MerlMovie support for further assistance. You can usually find contact information on their official website or on the app page in the App Store.

These steps should help you resolve most issues with the MerlMovie app. If you continue to experience difficulties, additional information may be required to diagnose the problem further - learn more - learn more - learn more.