[NetworkPerson]

Something to listen in on live calls seems kinda creepy to be honest and would be abused far past your use case.

I’ve used RoboKiller before for myself. It did a fantastic job at nuking most every spam call. Maybe that would work for you?

[aydin212]

RoboKiller blocks known spam numbers, but new scam numbers slip through daily. The idea here is detecting scam tactics during the call — urgency, pressure, "act now" language — not just the number. But I hear you on the creepy factor.