GoKawiilApple and Google's built-in tools now rival Truecaller for blocking spam calls
iPhone and Android devices include native spam-call filtering that can replace third-party apps like Truecaller. On iPhone, users can enable Call Filtering under Settings > Apps > Phone to send carrier-flagged junk calls to voicemail, separate Unknown Callers into their own list, and choose how to handle unrecognized numbers via the Screen Unknown Callers settings, including an option that asks callers to state their reason before the phone rings through.