Is the RevenueCat SDK first party in Flutter for iOS? I'd start with the library developers for your question. You could try using the native swift version of RevenueCat and see if the same problem exists.

Kevin, HealthKit is meant for a single individual, not 'shared'. HealthKit can be used without an Apple ID. It would be just the same as running on a simulator that isn't signed in. That having been said, while you could technically do it, it is overkill and using HealthKit outside of the intended scope. I'll speculate that the built-in pedometer will also not have super reliable results given the way each user walks is different. This is what generates samples for HealthKit under the hood. If you're going to pursue this concept, I would instead recommend using the CMPedometer API directly, which allows for up to 7-days of historical data.

It is referenced in this video to in fact use ASWebAuthenticationSession but I haven't found any useful information in the documentation on how to get it setup with the callback yet: https://developer.apple.com/videos/play/wwdc2020/10174/?time=909

I just received access to the beta. I'm encountering the same issue. I created this feedback: FB9799246 If you create your own feel free to mention so Apple can link as related.

I spoke with both App Clip and CloudKit engineers during WWDC 2021 in lab sessions. They're aware of the request. That having been said the temporary solution that we came to through conversation is to use the CloudKit Web Services. I've decided for my AppClip I can live with read-only access to just the public database. I have this working and have fully mirrored the CKQueryOperation and CKFetchRecordsOperation functionality using the Cloud Kit Web Services API. This is something that I would potentially open source if others are interested in working on it with me as an interim solution until (if) official support happens.

I asked the AppClip team this question in a WWDC21 lab session. The answer, presently, was that there is no limit to the number of advanced app clip experiences you can make. This is great—now the problem I will have is squishing my urls to fit into the app clip generator.

Their encoder can only fit in so many characters. QR codes have a lot more data storage capability. Check out this link for more details, however there is no clear documentation on the length. I was also looking for a concrete number but it is probably indeterminate. Unfortunately, my domain name is quite long so I'm probably stuck with only a few chars available for my query params :( Apple Documentation: Encoding a url in an app clip code

Not sure if it is available in App Clip targets, but you could try using DeviceCheck and flipping a bit. Device Check API

Is Sign In with Apple an option to you? That is designed to work beautifully with App Clips! If you're using third party login that isn't for that third party, you'll have to add Sign In with Apple anyways to conform to the App Store guidelines.

From the video on creating app clips for other businesses, it seems like it shouldn't be bounded to the number you can make. However there is probably a practical limit. I'd also like to know! Do you want different App Clip Cards, or just the app clip experience to be different once the clip is launched? You could use query params in your URL to control what content is shown in the application.