Hobart’s free Filler Metal Selector and Calculator app for iPhones and iPads determines how much filler metal is needed for a job and provides recommendations. It also includes a volume and heat input calculator, and a hard-facing product cross-reference function. Users select a weld joint type and enter the dimensions of the weld size using standard or metric units. It requests the total weld length, material and transfer modes, resulting in a calculation for the amount of filler metal in pounds or kilograms. The calculator works for aluminum, stainless-steel and carbon-steel MIG and flux-cored welding applications.