This application, named after the character "Huggy Bear" from Starsky & Hutch, allows gas professionals (utilities, gas installers, engineering services, etc.) to check and compute the various parameters of a gas installation: gas pipe types list and their diameters, conversion of gas pressure related to gas flow and gas type (Renouard formula), computation of the needed gas pipe diameter for a gas installation (Renouard formula), computation of the resulting gas pressure and gas speed depending on the gas pipe diameter (Renouard formula).