Firewall affords users very little freedom to customize their call blocking experience. The app simply blocks calls from numbers not featured on the user’s “Allow” list.

Like most spam blockers, Firewall simply blocks calls from phone numbers on a block list—the problem is,scammers can just change numbers to get around that. RoboKiller, on the other hand, uses machine learning to detect scammers based on their unique audio fingerprints. Scammers may change their numbers, but they can’t change their voices.

Firewall offers SMS protection, but it can’t keep up with spammers like RoboKiller can. Our spam text blocking is 99% effective at identifying and shutting down text scams.

Some robocallers imitate local phone numbers so you’re more likely to answer them. Unlike Firewall, RoboKiller knows how to identify and stop these sneaky spam calls before they reach you.

RoboKiller doesn’t just block robocalls—we make it fun. Answer Bots intercept incoming spam calls and mimic a real person to waste telemarketers’ time. You can even listen to the recordings. It’s a little poetic justice (and bonus entertainment) that Firewall just can’t offer.