Background: Although numerous mental health apps are commercially available, only a few of them have been empirically tested. PsyPills is an interactive and personalized mobile application, based on emotion regulation research and Rational Emotive Behavior Therapy principles, that can function as a stand-alone intervention aimed at offering immediate stress relief. Objective: In this paper, we describe the newly developed PsyPills app and present data obtained at 6 months after its release regarding its effectiveness for stress management. Methods: 115 users aged 15-79 years old (M = 39.01, SD = 13.49) accessed the app during the first 6 months after its release and were thus included in the study. Distress and specific cognitive processes were collected using visual analog scale measures. Results: Most users accessed the app with the purpose of searching anxiety relief and most often reported work-related distress. Seventy-Four users accessed PsyPills between 1 and 11 times (M = 2.68, SD = 2.59), and received 258 psychological prescriptions in total. PsyPills was effective in terms of reducing the frequency of dysfunctional emotions, such that significantly more users reported feeling functional emotions after accessing the application and reading its personalized prescriptions than those reporting not being able to change it [χ2 (1, N = 52) = 52.00 p < 0.001]. Using reminders of the psychological pill at specific times during the day made the PsyPills app more effective. Conclusions: Based on initial data on its first 6-month usage, the PsyPills app appears to be promising in terms of offering stress relief. However, future studies need to use golden standard design and investigate its efficacy as an adjunctive intervention.
Keywords: cognitive change strategies; computerized CBT; emotion-regulation; functional reappraisal; mobile mental health; psychological pills; stress management.