RoboKiller answers every call and “tricks” robots to start their prerecorded message.
Within seconds the voice goes through an algorithm to assess if it is human or robotic.
Real callers would hear the common sound of a phone ringing as the app goes to work and examines the call.
Calls determined to be from a robot would be blacklisted to a spam folder in the app, letting mobile phone users browse rejected calls like junk email.
The tool may solve the puzzle of how to stop robocalls without blocking calls from spammers spoofing legitimate phone numbers.
Garr says he’s yet to get a robocall since installing the technology on his own phone.
Fifteen robocalls have gone to his spam folder in nine days.
“Our accuracy in detecting humans versus robots is 98 percent,” Garr said.
The app is in beta testing.
More information is on RoboKiller's Kickstarter page.