The investigators developed a responsive mobile-web app, "Jauntly," which was designed to take advantage of the known connections between positive emotions, stress reduction and stress resilience. The app's goal was to lead users through research-proven positive emotion-enhancing exercises and relevant educational materials. Intervention activities covered five well-being-generating content areas: 1) promoting the experience and recognition of gratitude; 2) encouraging positive social relationships and feelings of social support; 3) improving stress resilience via mindfulness and other relaxation-focused activities; 4) focusing and capitalizing on individual strengths (as opposed to limitations and weaknesses); and 5) general positive mood inducing activities. Program content was adapted from a variety of stress-relevant research areas including health psychology/psychosomatic medicine, social/personality psychology, positive psychology, and clinical psychology.