Hi there! I see you're experiencing crashes with the Sendwave app on your iPhone running iOS 18.5. I want to help you get this sorted out. To start, could you tell me a bit more? For example, does the app crash immediately after opening, or does it happen during a specific action like sending money or logging in? Also, have you noticed any error messages when it crashes?

In the meantime, here are some initial steps we can try to fix app crashing issues on iOS devices:

1. Force quit the Sendwave app: Swipe up from the bottom of the screen and pause to bring up the app switcher. Then, swipe the Sendwave app off the screen to close it completely.
2. Restart your iPhone: Hold down the side button and volume button until the slider appears to power off. After the phone turns off, turn it back on.
3. Update the Sendwave app: Open the App Store, go to your profile, and check if there’s an update available for Sendwave. Updating can fix bugs causing crashes.
4. Reinstall the app: If the problem persists, try deleting Sendwave from your device, then download and install it again from the App Store. This can clear corrupted app data.

If after these steps the app still crashes, please let me know if the issue happens while performing a specific function or if you use any specific payment method during the crash. That will help in digging deeper into the cause.

Are you okay with trying these steps now? Let me know how it goes!