Can a smartphone app help young adults kick the tobacco habit?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-identify being between 18 and 30 years of age * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must be a United States (US) resident, with a US mailing address * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report use of any (non-therapeutic) nicotine or tobacco product at least once per week in the 30 days prior to screening * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must own a smartphone * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report having internet access for the interviews * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report that they are interested in participating in the study for themselves (versus \[vs\] someone else) * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report that they have not participated in one of our prior tobacco cessation studies * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report that they understand and agree to the conditions of compensation * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must self-report that they are not currently incarcerated * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Participants must be willing and able to complete study procedures in English * PILOT TRIAL: Participants must self-identify being between 18 and 30 years of age * PILOT TRIAL: Participants must currently reside in the US and anticipate continued residence for the duration of the study (3 months) * PILOT TRIAL: Participants must self-report use of any (non-therapeutic) nicotine or tobacco product at least once per week in the 30 days prior to screening * PILOT TRIAL: Participants must own an Android (running version 12 or higher) or iPhone (running iOS version 17 or higher, iPhone 11 or more recent) * PILOT TRIAL: Participants must self-report having at least weekly internet access for the next three months * PILOT TRIAL: Participants must be willing and able to download an app to their phone and receive text messages * PILOT TRIAL: Participants must self-report current use of a personal email account * PILOT TRIAL: Participants must self-report current use of text messaging * PILOT TRIAL: Participants must self-report that they are interested in participating in the study for themselves (vs someone else) * PILOT TRIAL: Participants must self-report that they have not participated in one of our prior tobacco cessation studies * PILOT TRIAL: Participants must self-report that they understand and agree to the conditions of compensation * PILOT TRIAL: Participants must self-report that they are not currently incarcerated * PILOT TRIAL: Participants must be willing to use the assigned intervention program, complete the study assessments, and complete an online consent form in English * POST PILOT TRIAL DIARY STUDY: Participants must self-identify being between 18 and 30 years of age * POST PILOT TRIAL DIARY STUDY: Participants must currently reside in the US * POST PILOT TRIAL DIARY STUDY: Participants must self-report use of any (non-therapeutic) nicotine or tobacco product at least once per week in the 30 days prior to screening * POST PILOT TRIAL DIARY STUDY: Participants must own an Android (running version 12 or higher) or iPhone (running iOS version 17 or higher, iPhone 11 or more recent) * POST PILOT TRIAL DIARY STUDY: Participants must self-report having at least internet access for the duration of the diary study * POST PILOT TRIAL DIARY STUDY: Participants must be willing and able to download an app to their phone and receive text messages * POST PILOT TRIAL DIARY STUDY: Participants must self-report current use of a personal email account * POST PILOT TRIAL DIARY STUDY: Participants must self-report current use of text messaging * POST PILOT TRIAL DIARY STUDY: Participants must self-report that they are interested in participating in the study for themselves (vs someone else) * POST PILOT TRIAL DIARY STUDY: Participants must self-report that they have not participated in one of our prior tobacco cessation studies * POST PILOT TRIAL DIARY STUDY: Participants must self-report that they understand and agree to the conditions of compensation * POST PILOT TRIAL DIARY STUDY: Participants must self-report that they are not currently incarcerated * POST PILOT TRIAL DIARY STUDY: Participants must be willing to use the intervention program, complete the study assessments, and complete an online consent form in English Exclusion Criteria: * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Individuals must not be \< 18 or \> 30 years of age * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Individuals must not have a Google voice number as their sole phone number * USER-CENTERED DESIGN AND PROGRAM DEVELOPMENT: Individuals who are non-English speaking cannot participate, as this would prevent their participation in the interviews, which will be conducted in English * PILOT TRIAL: Participants must not be \< 18 or \> 30 years of age * PILOT TRIAL: Participants must not be currently using other tobacco cessation treatments at the time of screening, including pharmacotherapy or behavioral support (but initiating these treatments during the study is allowed) * PILOT TRIAL: Participants must not be a member of the same household as another research participant * PILOT TRIAL: Participants must not have a Google voice number as their sole phone number * PILOT TRIAL: Participants must not be identified as fraudulent per our fraud prevention protocol * PILOT TRIAL: Participants must not be pregnant or plan on becoming pregnant over the next 3 months * POST PILOT TRIAL DIARY STUDY: Individuals must not be \< 18 or \> 30 years of age * POST PILOT TRIAL DIARY STUDY: Participants must not have a Google voice number as their sole phone number * POST PILOT TRIAL DIARY STUDY: Individuals who are non-English speaking cannot participate, as this would prevent their participation in the interviews, which will be conducted in English