Unguided Internet-based Relaxation Program for Anxiety

This intervention is a fully automated, unguided internet-based relaxation program in English. Unlike many digital mental health programs, it required no therapist involvement or incentives and was structured for real-world use. It combined evidence-based techniques-mindfulness, deep breathing, progressive muscle relaxation, guided imagery, and acceptance practices-delivered via audio modules. The program was tested in two formats: a 4-week daily format (28 sessions) and a revised 3-week modular format (21 sessions) with enhanced usability and adherence features, such as a simplified multimedia interface, reminder emails, and optional reflection prompts.