I have such an app. It's called RoboBlocker. I used to use a different app called RoboKiller, but recently switched. Both work basically the same way. They auto

I have such an app. It's called RoboBlocker. I used to use a different app called RoboKiller, but recently switched. Both work basically the same way. They automatically block known spammers/scammers and screen the rest.