Fabulous is a comprehensive self-improvement app designed to help users build healthy habits, improve their routines, and enhance their overall well-being. Developed at Duke University’s Center for Advanced Hindsight, the app utilizes principles from behavioral economics and psychology to support users in achieving their goals. It offers personalized plans and guided sessions focused on various aspects of self-care, including sleep, productivity, mental health, and fitness.

Fabulous features Journeys and Challenges, structured programs that guide users through building new habits and routines over several weeks or shorter periods. The app includes activities like daily coaching sessions, meditations, workouts, and gratitude journaling. Users can join community spaces called "Circles" to engage with others on similar journeys, providing a sense of support and motivation.