Who Is On My WiFi? is a free application designed for Mac users to monitor their wireless network by identifying all devices connected to it. The primary function of the software is to detect authorized and unauthorized devices, providing users with a comprehensive overview of their network's security status. It displays detailed information including IP addresses, MAC addresses, and the names of connected devices, allowing users to easily recognize any potential intruders.

The application enhances network security by alerting users when an unknown device connects to the network, even if it is password-protected. A unique feature is the voice notification that informs users of new connections, ensuring they remain aware of their network activity. By marking recognized devices as 'Known' and leaving others as 'Unknown', users can effectively manage their WiFi connections and safeguard against unauthorized access.