Inclusion criteria:  MD Anderson patient between the ages of 18 to 65 current smoker (i.e., at least 1 cigarette or e-cig per day) smoking for at least one year, willing to set a quit date in the next 30 days, not engaged in smoking cessation treatment other than the MDACC Tobacco Treatment Program English speaking and ability to read and comprehend English, and 7) currently own an iOS mobile phone (iPhone) using iOS 9.0 or later and reports regular use (at least weekly) of at least 1 iOS app.  Exclusion Criteria  endorsing current suicidal ideation or intent, meeting criteria for a current Major Depressive Episode measured by the PHQ-9, any medical or psychiatric condition, illness, disorder, or concomitant medication that could compromise participant safety or treatment, as determined by the Principal Investigator or Collaborator, subject considered by the investigator an unsuitable candidate for receipt of a smoking cessation treatment or unstable to be followed up throughout the entire duration of the study. Pregnant women will not be excluded from participating in the study and any decisions about potential pharmacotherapy will be done as standard of care in the Tobacco Treatment Program, including a consultation with the medical team and a joint decision-making process with the patient to determine the best course of treatment given all co-morbid medical conditions.