Well, maybe he thinks ethical systems like utilitarianism or deontology answer whether something is ethical or not. That said, I struggle to think of any ethic

Well, maybe he thinks ethical systems like utilitarianism or deontology answer whether something is ethical or not. That said, I struggle to think of any ethical system that says lying to your users and tricking them into giving away personal information is 'moral'. The likes of Aristotle or Kant would probably consider this app and its design morally questionable.