Unravel is a mobile app that helps flat-rolled steel buyers calculate steel weight, cost and yield to illuminate the total cost of steel ownership. Unravel makes it easy to verify steel coil and sheet specs. Calculate the weight of a steel coil without a scale, convert gauges to decimals instantly, and find the number of sheets in a bundle. Convert easily between imperial and metric units for both coil and sheet measurements. Make complex steel calculations with this essential iPad and iPhone application .