The Navarinilab at University of Zurich has a focus of developing clinically useful tools for clinicians. The severity of atopic dermatitis is difficult to judge for most clinicians, especially non-experts. To enable all dermatologists to measure atopic dermatitis severity, we are developing a mobile app in collaboration with Swiss4ward that allows physicians to quickly and accurately calculate the Eczema Area and Severity Index (EASI). The navarinilab contributes the clinical expertise, the workflow and integration in clinical use. Programming is performed by Swiss4ward. This academic project is sponsored by Sanofi who have no influence on the content.