Calling Screen

Is there a way to add a button to the calling screen or when someone call detect and add ActionSheet.
What I am trying to do is an action before the user answer the phone.

I implemented it by native code. You need to add Broadcast and use Alert layout (Android). It’s not easy.

Is this also possible for iOS?

Sorry, I don’t know native iOS. If for iOS you can catch the call event, then I think it’s possible.