Quitting Schedule Mobile Smartphone Application in Helping Participants to Quit Smoking

Inclusion Criteria: * Current smokers (those who smoke at least 5 cigarettes a day; confirmed with carbon monoxide (CO) levels equal or above 7 parts per million ) newly enrolled in the Tobacco Treatment Program at MDACC (Aim 2 ) * Male or female (Aim 2) * Adult cancer patients - 18 years or older (Aim 2) * Current smokers seeking care at the Tobacco Treatment Program at MD Anderson and at Houston area community services who have smoked at least 100 cigarettes in lifetime * Willing to download and use the app Quitting Schedule (Aim 2) * Willing to set a quit smoking date within 5 weeks of the enrollment (Aim 2) * Ownership of an iPhone or Android smartphone (Aim 2) Exclusion Criteria: * Unwillingness to participate in the study (Aim 2) * Enrolled in another cessation program (Aim 2) * Current use of NRT or other smoking cessation medications,e.g. Varenicline or Bupropion outside of the MD Anderson Institution (Aim 2) * Expired CO levels below 7ppm (Aim 2)