Use of a Smartphone Mobile Application (App) to Enhance Smoking Cessation Treatment

Inclusion Criteria: * MD Anderson patient between the ages of 18 to 65 * Current smoker (i.e., at least 1 cigarette or e-cigarette 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 * Currently elevated depressive symptoms or a history of elevated depressive symptoms; (PHQ 2 = or \> 1); current or past * English speaking and ability to read and comprehend English * Currently own an iOS mobile phone or tablet (iPhone; iPad) using iOS 9.0 or later and reports regular use (at least weekly) of at least 1 iOS app Exclusion Criteria: * 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