Panic attacks are intense episodes of discomfort, fear, and feelings of helplessness experienced by millions of people every year. Fortunately, panic attacks can be effectively treated with biofeedback therapy, which combines the minute-by-minute tracking of respiratory rate, heart rate, and subjective anxiety levels. Unfortunately, there are currently no widely accessible, accurate means for delivering this therapy. We aim to create an app to disseminate this intervention to anyone in need.