All groups will be able to select a quit date within a 7-day window (between 2 and 3 weeks after they complete the baseline survey). Participants in Arm 3 will receive motivational/informational messages while participants in group 1 will receive only assessment messages. Participants in Arm 2 will receive the countdown messages to their quit date, but not the motivational messaging after their quit date. Like Arm 1, they will only receive assessment messages after their quit date.