BlastCalc is a functional and easy to use blast volume, charge per hole, powder factor, rock tonnage, hole length and much more iOS pocket calculator.
BlastCalc has the ability to email the calculations to whomever you were discussing them with. Useful for tracking the ideas and thoughts that were made on bench with the people involved.
BlastCalc also will operate in either imperial or metric amounts and provides a wealth of information that you would otherwise have to get the pen, paper and calculator out for.
You can use BlastCalc to almost... write the shot report for you... well almost.