(1) age 18 or older, (2) smokes at least five cigarettes daily for at least past 12 months, (3) wants to quit in the next 30 days, (4) interested in learning skills to quit smoking, (5) resides in US, (6) has at least daily access to their own smartphone, (7) knows how to login and download a smartphone application from their smartphone, (8) willing and able to read in English, (9) not participating in other smoking cessation interventions (including our other intervention studies). To increase follow-up retention, eligibility criteria also include: (10) willing to complete one follow-up survey, (11) provide email, phone, and mailing address.