The app will be useful to any merchant who sells products when the quantity of the product that should be purchased is determined by the area or cubic volume of the purchaser's project. Examples include merchants that sell building materials, cleaning products, flooring, concrete products, fertilizer, paint, soil, tile, turf, or any product whose description includes words such as, "One unit will cover X". Requires the use of a theme that complies with Shopify Online Store 2.0 and App Blocks.