Why use " Home Security - Wi-Fi Scanner"

Just got a renewal notice from APPLE re "Home Security - Wi-Fi Scanner". Over the last year I dont believe I got any messages at all from this app. It supposedly automatically detects and lists all devices connected to my WI-Fi network. I opened the app and cannot see any way to even inquire about connected devices. ("allow tracking" is turned off; other choices are on.)

If it isnt telling me anything, and hasnt for a year (or more?) why would I want this?