With many magazines on united-kiosk.de, the publishing house gives his print subscribers the chance to order the epaper subscription cheaper or for free. You can buy an "epaper subscriptions exklusively for print subscribers" this way:
Simply search for the magazine you want on united-kiosk.de and click on "epaper subscription exklusively for print subscribers". You will be forwarded to the registration page, where you have to enter your subscription number and you postal code.
Just a hint: You can find the subscription number on the mailing label of most printed magazines. Alternatively you can just ask the publisher of the magazine.
After entering the subscription number and the postal code you will be forwarded to the ordering process, can immediately activate your epaper- subscription and can start reading in the fitting App or the online-library.