The Blood Donation Calculator is a free tool to help you calculate the earliest possible date for your next blood donation. It is possible to calculate for one's own data or to use the data of the male and female users of the app.

This tool is used for the calculation of blood donations and is based on the current German Red Cross guidelines. It is the most recent and accurate version of the tool available in the Google Play Store.

It is possible to use this app to check your own data or to use the data of other users.