Date Calculator Free is Free version App that made to help a math calculation based on date. This app can calculate easily as same as general calculator, but have capability to do calculation based on date orientation. So in this app we will not find minus value, since the minimum value is zero. The main idea why this calculator has been made, it's because we notice that indirectly we often do math operation based on date. For example to know how many days betwen two date, what date after few d