NALU Endo Flow App is a mobile application for women with endometriosis. The App provides educational information through videos, audios, and texts. Women learn about endometriosis in general with its symptoms, diagnosis, and therapy options such as lifestyle and mindset modification, endometriosis-specific diets, physical and mindfulness exercises. The App includes a diary to track the menstrual cycle and symptoms. Furthermore, access to a WhatsApp community of people with endometriosis is provided and a peer-group call is performed once monthly, as well as one additional monthly Q&A (Question&Answer) call moderated by certified health coaches.

The primary endpoint will be the change in quality of life in App users assessed by the EHP-30 questionnaire (Endometriosis-Health-Profile-Questionnaire: The questions can be divided into five subscales covering 'pain', 'control and powerlessness', 'social support', 'emotional wellbeing' and 'self-image'. The questionnaire is standardized on a scale from 0 to 100, with lower scores indicating better quality of life.

The secondary endpoint of this study is the change in pain intensity in App users measured by the VAS (Visual Analogue Scale). The VAS is one of various instruments to measure pain intensity. A score of 0 means "no pain", a score of 10 "the worst imaginable pain".