Evaluating the Effects of a Self-help Mobile Phone Application on Worry and Overthinking in Young Adults Aged Between 16 and 24.

The self-help app includes self-monitoring, psychoeducation and active self-help exercises. The self-monitoring includes daily mood ratings and an ecological momentary assessment option (MoodTracker) for more detailed analysis of mood, worry, activity and situational context. The digital self-help provides psychoeducation, tips, advice, exercises and training for each individual focused on reducing worry and rumination, using strategies from the proven rumination-focused CBT intervention. The app includes text, pictures, audio-recordings, animations, audio-exercises to practice (e.g., self-compassion, relaxation, concreteness exercises), and questionnaires with tailored feedback. The app is designed for iOS and Android use.