I found it very difficult deleting the Robokiller app. The reason I wanted to delete the app was because it was blocking all of my incoming calls and not just scam calls. After much time and effort, I had to go to the Apple store to have one of their geniuses figure out how to delete the Robokiller app. Your instructions on the app to delete the app do not work. Need to fix those quirks in the app. Thanks. User's recommendation: Beware of app. It may block all of your calls. Even contacts.