yes, i want to do it in iOS , natively in code(swift). Basically i want to have a check on our side to know if my app has been tampered with or not. I had an idea of verify the code signature to get this done. But i am not sure . I would love to get an solution for handling this situation of knowing if someone has tampered with the app and throw an popup alert when found.

Thanks for the answer. It clarified a lot of things. But is there a way to get Get Certificate SHA1 Fingerprint in iOS. I know in mac os its pretty straight forward. Can we still fetch it somehow on IOS

or maybe any standard checks that i can use on my native code to ensure the integrity of my app, except app attest?

I am trying to calculate sha value during launch and comparing it with the one that i have stored in server to check app integrity.