App-based Stress Management With the mHealth Application "Harmony"

App-based Stress Management: A Pragmatic Randomized Controlled Trial on the Efficacy of the mHealth Application "Harmony"

The purpose of this study is to investigate the efficacy of app-based stress prevention via the harmony application in a prospective, interventive, monocentric, explanatory pilot randomized controlled trial (RCT), with participants' subjective stress experience as the primary endpoint.

Research question: Does usage of the app harmony have a positive impact on the subjective experience of stress of its users? Do usage frequency, intensity or width of content engagement influence the efficacy of the intervention?

Hypothesis: We expect improvement of participants' subjective stress experience, stress-related symptoms, subjective well-being, resilient coping, self-efficacy, life satisfaction and goal-attainment.

Inclusion Criteria:

• Increased stress level (PSS-10 >= 19; corresponds to one standard deviation (SD 6.42)) above the mean (PSS-10 = 12.57) in a representative sample of the German population (Klein et al., 2016)
• Fulfillment of technical minimum requirements (internet and smartphone access with suitable operating systems)
• German language skills at a native level or the ability to use the language at at least B level
• Written informed consent to participate in the study after being informed about the study

Exclusion Criteria:

• Inclusion criteria not met.