Collect, shop, save and win! The Müller app offers you many advantages, such as a digital customer card, coupons, competitions and much more. Benefit from these advantages. This is how it works: 1. Download the Müller app for free 2. Register for the Müller customer card via email address and password 3. In order to benefit from the many advantages of the app, you need to provide a few personal details. You decide for yourself which data you would like to provide and can activate notifications