Solomiya App - CBT-based Self-help Intervention

Participants will be recruited via Educational - scientific institute of mental health of the Bogomolets National Medical University. An eligibility screening will be conducted prior to study inclusion within the Solomiya App. The SOLOMIYA app has been created within the Solomiya project (available on iOS (App Store) and Android (Google Play) platforms) and is based on preliminary work in other international health settings (Böge 2022). It combines psychoeducational multimedia content (e.g., on stress management and sleep problems) and evidence-based CBT-based therapy tools such as relaxation and mindfulness techniques. The app enables users to self-monitor stress symptoms using the PHQ-9 scale. Participants will carry out self-reported assessments at baseline (T0) and after the intervention phase of 4 weeks (T1) and a follow-up 4 weeks after the intervention phase (T2; 8 weeks post baseline). App feasibility and acceptability will be evaluated via user behaviour, particularly in terms of adoption, retention and dropout. User behaviour data will be collected via aggregated app usage metrics as well as user-approved in-app tracking of individual usage patterns, including session frequency and engagement with specific features. Mental health parameters such as depressive symptoms, psychological distress, quality of life and sleep quality will be assessed using standardised, validated questionnaires administered at T0, T1 and T2. The data management plan includes standard procedures for data-handling such as using anonymized identification codes for patient data. The data will be collected and saved in a GDPR-compliant online database on German servers (servers that belong to the Charité), only allowing researchers involved in the study to access the data.