Table 1 shows the frequency of use of the top 10 app features,
ranked according to the number of participants who accessed
the feature at least once. The top eight ranked features
were the only ones out of more than 40 total app features for
which the median number of uses per participant was greater
than one. Thus, these features were not only accessed by the
highest number of users, they also tended to be accessed
repeatedly by users. Notably, eight out of the top 10 most
popular features were based on traditional CBT: developing a
quit plan (#1), tracking (tracking smoking, #2; viewing
locations of tracking, #7); viewing progress (in calendar form,
#3; in chart form, #5; in the form of badges earned, #9),
sharing (#4), and journaling (opening notes, #10). The only
two ACT-specific features represented in the top 10 list were
tracking practice of letting an urge pass (#6) and viewing an
ACT exercise for staying motivated (#8).