Spy gadgets are specialized tools used by intelligence agents and private investigators to gather information discreetly. These devices can include hidden cameras, listening devices, and GPS trackers, all designed to operate without drawing attention. They help in surveillance and monitoring activities, making it easier to collect evidence or track movements. Many spy gadgets are compact and portable, allowing for easy concealment. For example, a pen camera can record video while appearing to be an ordinary writing instrument. Similarly, smartphone apps can turn a phone into a powerful surveillance tool, enabling users to capture audio or video without anyone noticing.