Tension Software (www.tensionsoftware.com) has updated Date Time Calc for Mac OS X to version 2.1. It’s an app to calculate future and past dates by adding a date interval and to calculate date difference between two assigned dates.

You can add or subtract to dates, years, months, and days — or add or subtract days, hours , minutes and seconds to guess future and past date-times. You can also calculate difference between two dates using calendar specification (years, months and days) or using a time precision method specifying date and time and obtaining a difference in days, hours, minutes and seconds.

With version 2.1, the log can collect and save all the calculation you need to record using a command button. Also, at any time you can clean the log by resetting it.

Date Time Calc 2 .1 requires Mac OS X 10.10 or later. It costs $4.99 and is available at the Tension Software website and the Mac App Store (http://tinyurl.com/jxsfc5e).