Apple to help India develop anti-spam app

I support Apple in their privacy concerns, but this seems like they don’t want to put in the resources and annoy mobile operators. Can’t they use their favorite differential privacy and figure this out. I love Google’s phone app on their Pixel devices and how it will show suspected spam calls. I am trying to mimic this on an iPhone and you can now with iOS 10, but any of the decent options that don’t require uploading your phonebook need a small monthly fee. Since Apple is building this for India, they must bring it to the rest of the world. People will love it.