App Impact on Quality of Life and Symptoms in PCOS

Inclusion Criteria: * Legal capacity * Resident in Germany * Female gender * Age ≥18 years up to 65 years * Diagnosed and medically confirmed Polycystic Ovary Syndrome (E28.2) * Ownership of a smartphone with a compatible iOS or Android version and the ability to operate it * Internet access and an email address for registration, app usage, and completing questionnaires * Willingness to complete questionnaires online * Motivation to use the app regularly * Sufficient knowledge of the German language Exclusion Criteria: * Changes in hormone therapy within eight weeks prior to the start of the study and/or planned within the next 12 weeks * Changes in treatment with metformin within eight weeks prior to the start of the study and/or planned within the next 12 weeks * Current treatment with medications for obesity (e.g., liraglutide, orlistat) * Changes in treatment with anti-androgens (e.g., spironolactone, cyproterone acetate, flutamide) within eight weeks prior to the start of the study and/or planned within the next 12 weeks * Pregnancy or breastfeeding * Current hormonal fertility treatment * Changes in treatment with psychotropic medications within eight weeks prior to the start of the study and/or planned within the next 12 weeks * Current psychotherapeutic treatment * Previous or current access to the Endo-App or other digital health applications (DiGAs) * Current participation in other clinical studies * Current nutritional counseling according to §20 SGB V or nutritional therapy according to §43 SGB V, or participation in weight reduction programs