Pacifica is rooted in cognitive behavioral therapy, combined with relaxation and wellness techniques. These are recommended tools for managing anxiety, stress and worry. As an app, Pacifica distills these techniques down into simple, quick, daily activities and provides a way for people to track their progress.
From the National Alliance on Mental Illness:
"Cognitive behavioral therapy (CBT) is a form of treatment that focuses on examining the relationships between thoughts, feelings and behaviors. By exploring patterns of thinking that lead to self-destructive actions and the beliefs that direct these thoughts, people with mental illness can modify their patterns of thinking to improve coping."