In terms of call blocking, RealCall relies on Verification Code Identification which is not supported by RoboKiller app that works based on voice identification that is limitedly useful to detect robocalls alone. Compared with voice identification, Verification Code Identification makes RealCall safer than RoboKiller in that it allows users to decide whether to receive a call or not.
The Custom Blocking Rules philosophy supported by RealCall allows its users to block real spam calls, letting go of legitimate calls from government, official banks or hospitals, which is not supported by RoboKiller that possibly blocks both legitimate calls and spam calls randomly. You should avoid all spam or robocalls but you also need to receive calls from necessary organizations.
Although RealCall costs the same price as RoboKiller, they work in different ways and users are able to gain more fantastic features from RealCall. Apart from calls and message blocking, RealCall enables users to customize blocking rules so that the real spam or robo calls or texts can be perfectly filtered with legitimate ones passing through.
Compared with RoboKiller, another essential advantage of RealCall lies in its fraud SMS detection feature that is able to detect dangerous text message scams based on machine learning and send alerts to stop users from clicking the link contained in messages or replying to them. Whenever a suspicious text message arrives, it'll be instantly detected by RealCall that will notify you at the first moment.