I also try not to expose my personal information when using SNS or Messenger. Our personal information can be exposed to crime, and we can be in trouble in the future because of what we wrote in SNS or Messenger in the past. Confide is a highly secure messenger that is relatively secure because when we chat with this app, the message is encrypted and the conversation cannot be screen-captured. But taking the screen itself with a different smartphone camera will be helpless. Anyway, thanks for hunting good apps.