Recently Apple updated Xcode and had one change for App Clips. For a URL to launch it needs the additional of "nullable" See link here. - https://developer.apple.com/documentation/app_clips/apactivationpayload/3580308-url?changes=latest_major&language=objc One problem. My App Clip works fine but there is nowhere in the code where to use the code defined in the link, either the previous or the new updated code. I only use NFC for the App Clip. So does this not involve NFC? It mentions payload which I'm used to hearing about with NFC chips, so that's why I'm wondering about it. I've also noticed NFC reading less consistently as background reader. Please let me know if this line has anything to do with NFC, and why my app would still work even though I don't even use this line anywhere in my code. Thank you truly and any help is appreciated. I just don't want to be missing something that might break my app in an upcoming update.

I'm looking to find a way that is private but let's us know if it is a user that has used our app clip before or is a brand new user. Similar to how you can find out how many unique users go to a website. This isn't for traking. Just for internal data to see if a new user has used your app clip of a pre-existing one. Can an app clip do this? And if yes,how? Thank you for any help you can give!