Mental Health INtervention With Digital APPlications (MIND-APP): Randomized Controlled Researcher Blinded Trial Evaluating the Effectiveness of the Tankevirus and Grubl Mental Health Apps

The MIND-APP trial is a 3-arm randomized controlled trial (1:1:1 allocation) conducted fully remotely via a bespoke smartphone research platform. A total of 1000 Norwegian residents aged 16 years or older with mild to moderate symptoms of anxiety and/or depression will be recruited through national digital outreach. Coprimary outcomes are changes in anxiety (Generalized Anxiety Disorder-7) and depression (Patient Health Questionnaire-9) scores from baseline to postintervention (2-4 weeks). Secondary outcomes include health-related quality of life (EQ-5D-5L), quality-adjusted life years accrued over 6 months, functional impairment (Work and Social Adjustment Scale), health care resource use, and adverse events. Incremental cost-effectiveness ratios for Tankevirus and Grubl relative to placebo will be estimated from the perspective of public health services.

Inclusion Criteria: * Adults and adolescents aged 16 years or older (16 is the minimum age of consent without parental approval for participation in research in Norway. Inclusion of individuals aged younger than 18 years will be highlighted in the ethical review.) * Residing in Norway * Access to a compatible smartphone (iOS or Android) * Reporting mild to moderately severe symptoms of anxiety and/or depression (Patient Health Questionnaire-9 \[PHQ-9\] score ≥5 and/or Generalized Anxiety Disorder-7 \[GAD-7\] ≥5) * Able to read Norwegian and use Norwegian to a sufficient level * Able and willing to provide consent for the study prior to participation Exclusion Criteria: * PHQ-9 score ≥20 (severe depression) * Active suicidal ideation (PHQ-9 item 9 score ≥2) * Have ever required hospitalization for mental illness or are currently taking antipsychotic or other psychotropic medications * Current engagement in psychological treatment * Report having used Tankevirus or Grubl apps in the past