Robokiller - Spam Call Blocker

What Robokiller does

Robokiller - Spam Call Blocker is a communication app for filtering unwanted phone calls and text messages. It identifies suspected robocalls, scams and telemarketing numbers, then lets you block them or keep them out of your inbox. It suits people who receive frequent nuisance calls and want more control than a basic phone blocklist provides.

Where it goes beyond a simple blocklist

Robokiller can work as the default SMS app, with filters for spam and scam texts. For calls, its protection combines an automatically updated database with number blocking and audio-based caller detection. You can add numbers yourself, keep trusted contacts on an allow list, and review missed or intercepted callers. Blocking can also be paused when you are waiting for a call from an unfamiliar number.

Screening and caller control

The app can ask callers to identify themselves before putting the call through, which is useful when you do not want every unknown number sent straight to voicemail. Its answer-bot feature takes a more playful approach by responding to unwanted callers with prerecorded audio. That may be a useful distinction if you want active handling of robocalls rather than silent rejection, though users who prefer a less involved call filter may value simplicity more.

What to consider

Robokiller also includes a personal-data protection feature intended to help find private information on public search sites and monitor for later exposure. That broadens its role beyond call screening, but it also means comparing it with another blocker involves more than detection accuracy: consider whether you want text filtering, caller screening and privacy monitoring in the same app. Mosaic Srl’s app has a 3.93/5 rating from 124,367 reviews and 5,000,000+ installs, giving it a substantial user base while leaving room to weigh those trade-offs for yourself.