CalcuDator Pro

CalcuDator Pro implements a new and simple way to execute date operations. It has the layout of a real calculator so you can perform operations such as adding and subtracting any number of days, weeks, months and years. You can even introduce any number of operands at the same time!. Just tap the date, select your desired date, enter the operands, hit enter and voilá!. Every operation you make is gonna be saved so you can navigate through the history for previous dates.
Also, it incorporates a date comparison mechanism, tap the date in the display, then tap the division symbol button, select the second date, and it will show the number of days, months and years between both dates, as simple as that.

Enjoy! :)