Hi there! I understand how frustrating it can be when the Walmart app crashes and sends you back to your home screen. Let's see if we can troubleshoot this together.

1. Check for Updates: Sometimes, issues arise due to outdated apps. Go to the App Store, tap on your profile picture at the top right corner, and scroll down to see if there's an update available for the Walmart app. If there is, please update it.

2. Restart Your iPhone: A simple restart can fix many temporary glitches. Hold down the power button until you see the slider to power off your iPhone. After turning it off, wait a few seconds, then turn it back on.

3. Clear App Cache: While iOS doesn't have a direct way to clear cache, you can try deleting the app and reinstalling it:
- Press and hold the Walmart app icon until it wiggles.
- Tap the "X" that appears to delete it.
- Go to the App Store, search for Walmart, and download it again.

4. Check Storage Space: Sometimes, if your phone is low on storage, apps can behave unpredictably. Go to Settings > General > iPhone Storage and check if you have sufficient space available.

5. Reset Network Settings: This can help if the app is not connecting properly. Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Please note this will erase your saved Wi-Fi passwords, so you’ll need to enter them again.

If you've already tried these steps or if the issue persists, let me know, and I can look into further advanced troubleshooting together or recommend contacting support directly! Are you satisfied with the solutions I provided?