Kelaa Mental Resilience App for Employees

The goal of this randomized control trial is to detect and prevent work-related psychological stress among European workers early on, aiming to mitigate its adverse health consequences, including burnout and depression. Soma Analytics has developed a smartphone-based system that comprises a diagnostic module utilizing smartphone sensors to collect and analyze stress biomarkers and an interventional module to reduce stress levels. The main questions this study aims to answer are: * Hypothesis 1: Compared to the waitlist control, after using the app for 4 weeks, participants in the app group will report (a) lower levels of stress (cognitive and general), (b) higher levels of wellbeing, (c) higher levels of resilience, and (d) fewer sleeping troubles. * Hypothesis 2: The observed effects will be more intense the more the user interacts with the app throughout the duration of the study. Participants (employees from six organizations in three European countries) will use the app for 4 weeks. Their levels of stress, well-being, resilience, and sleeping troubles are assessed at baseline, after 2 weeks (mid-intervention), 4 weeks (end of intervention), and 6 weeks (follow-up). Researchers will compare the intervention group with the waitlist control group to see if levels of stress, well-being, resilience, and sleeping troubles change over time.