Arbeitstage is a free Android app developed by Lausitz Software that calculates the number of work or school days until a set date. The app also allows you to include public holidays, vacations, and weekends as non-working days. Users can customize the app by setting the weekdays they consider as workdays (Monday to Friday by default).

One of the most useful features of this app is the ability to create different scenarios, such as "From today until the end of the year" or "From January 1st to June 30th." The app includes public holidays and vacations that are usually updated two to four years in advance, and users can also add new holidays, such as regional holidays.

It is important to note that this app is designed to calculate workdays in a manageable timeframe, from a month to a few years. It is not intended for long-term calculations, such as until retirement.

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