The blood donation app from the blood donation services of the German Red Cross In addition to the Germany-wide appointment search, the blood donation app also offers direct full access to the digital donor service. This is what the digital donor service offers you in the app: When can I donate again? Up-to-date you can see when you can donate again. You can also see how often you have donated blood, plasma and platelets. Appointment search Find suitable donation dates for you. You