Effectiveness of a Waitlist App "Stappvoorstap" During Mental Healthcare Waiting Times

This study evaluates the effectiveness of Stappvoorstap, a mobile self-management application designed for adults on mental health waiting lists in the Netherlands. The app helps users monitor daily stress levels, recognize personal stress patterns, and provides coping strategies, relaxation exercises, and supportive resources. Using a multiple baseline single-case experimental design, participants use the app for 4 weeks while completing weekly questionnaires measuring perceived stress, coping self-efficacy, and quality of life. The study aims to determine whether the app can reduce stress and improve wellbeing during the waiting period before mental healthcare treatment begins.