Modern power line construction leverages software and apps to streamline the sag calculation and verification process. While "sag calculation software" (e.g., PLS-CADD integration or dedicated calculation tools) determines the theoretical sag based on span, temperature, and conductor properties, physical "cable sagging tools" like digital sag scopes or dynamometers provide real-time data from the field. This data is then compared against the calculated values. The trend is towards mobile applications that can receive real-time inputs from intelligent tools (via Bluetooth or Wi-Fi), allowing immediate on-site verification and adjustment, greatly enhancing accuracy and reducing potential errors.