Date Calculator add to or subtract from a date

Добавить или вычесть дни или продолжительность (год, месяц, дни, неделя) из любой даты

This is a very simple date calculator app. It simply adds or subtract days or any duration (year, month, days, weeks). You can auto input current date. You can choose any one of three date format dd/mm/yyyy, mm/dd/yyyy, yyyy/mm/dd. This app has a ad-free paid version too.