The frequency of complex nutritional challenges such as malnutrition is increasing. At the same time, the evidence base on nutrition management is improving. This in turn increases the demand for nutritional medical treatments throughout Switzerland. This trend is evident in both inpatient and outpatient settings, where the number of patients with extensive nutritional problems is steadily increasing. With the growing number of high-quality studies, dietitians and counsellors are able to apply "evidence-based nutrition counselling and therapies" and adapt nutrition to the needs of the individual patient. In order to integrate existing counselling documents and therapy standards in a user-friendly electronic form, and at the same time to update these documents according to the current best evidence, we are launching the project "Mobile ERBAPP Nutrition and Dietetics". We want to integrate a mobile, digital working tool in the daily clinical routine of dietitians. ERBAPP can be widely used in both inpatient and outpatient settings. With this interactive progressive web-based mobile ERBAPP we want to improve and ensure the quality of nutritive care for patients with nutritional problems, which will ultimately lead to a better clinical outcome. This application will be interactive in design and will bring in-depth expertise in the clinical setting of nutrition counselling. This will optimize and ensure the quality of counselling and therapy. With the practical application of the mobile ERBAPP, the work of the digitalized and thus simplified, in the inpatient as well as in the outpatient area.