This iPhone / iPod Touch app contains four tabs: The first tab calculates the amount of cubic meters of concrete needed for a given job with a square or rectangular form. You input the length and width in meters and the thickness in centimeters. Also, you can input a cost per cubic meter to get a total cost of your concrete order. Tap on the calculate button and then ConcreteCalc Pro Metric displays the amount of cubic meters of concrete needed. The second tab calculates the amount of cubic meters of concrete needed for a given job for a sona tube or circular form. You input the diameter in centimeters, height in meters, number of columns, and cost per concrete meter(optional). Then tap on the calculate button and then Concrete Calc Pro will display the amount of cubic meters of concrete needed and/or the total cost of concrete. The third tab will figure your exterior footings. You input the perimeter in meters, then the width (centimeters) and depth (centimeters) of your footing. Optionally you can include the cost per cubic meter and waste overage percentage. Finally, tap on the calculate button and the number of cubic meters and total cost is displayed. The fourth tab will convert cubic meters to 25 kg or 50 kg bags.