Passive wireless detector, sniffer and wardriving tool. Channel-hops to log every AP, client and SSID (with GPS) and captures to pcapng without ever transmitting — the reference quiet survey/capture tool. Beyond Wi-Fi it has the widest 802.15.4/Zigbee datasource support of any tool here: a dedicated CatSniffer v3 Zigbee source (channels 12–26) plus nRF52840, CC2531, RZUSBstick, nRF51822 and NXP KW41Z (Kismet git / 2025-10+ releases).