Background and rationale
insomnia
DISORDERS
Sleep plays a vital role in maintaining physical and mental health [Insufficient sleep has been shown to adversely impact a multitude of outcomes, including cognitive performance, emotional regulation, and quality of life [There has been increased interest in the use of smartphone-based mental health apps (“MHapps”) to deliver psychosocial interventions. Relative to traditional care, MHapps are more accessible, can provide momentary support, are associated with lower costs, and can facilitate increased engagement through tailored interventions [To date, most evaluations of sleep interventions delivered via MHapps have focused on formal treatment programs designed for clinical populations and specific disorders, such as cognitive behavioral therapy (CBT) for insomnia [Although such standalone tools are widely used by individuals with disturbed sleep [Finally, there is ambiguity regarding the potential mechanisms of action of standalone audio tools in improving sleep health. One hypothesis is that they may counteract presleep sympathetic arousal [