Chatterbug Club is a premium feature in the Chatterbug mobile app that offers in-app social study sessions called Study Groups with experienced Chatterbug tutors. Study Groups are 15-minute classes with up to 4 other students, led by experienced Chatterbug tutors. Each Study Group is based on a stream, which students are expected (but not required) to watch before the session. Chatterbug Club offers Study Groups in German, Spanish, French, and English at beginner, intermediate, and advanced levels throughout the day, every day.