The necessity of a software application for the operation of a physical tool indicates a dependency on digital instructions for functionality. For example, a modern medical instrument may require a dedicated application on a tablet to interpret sensor data and display diagnostic information.
This requirement presents several advantages, including the capacity for regular updates to improve performance and add features. It also allows for customization and data logging capabilities that would be difficult or impossible to achieve with purely mechanical systems. Historically, such functionalities were embedded directly within the device, leading to higher production costs and limited adaptability.