ConcreteCalc Pro is available for iPhone, iPod Touch, and iPad. It helps concrete, masonry, and paving professionals reduce material waste, improve design accuracy, prevent rework, and cut estimating time. The software allows contractors to quickly and accurately calculate square-ups, loads, area, volume, rebar, drops, and stairs on the go. Contractors can even determine the number of bags of mix for small jobs. Calculated Industries. 800-854-8075.