Can a smartphone app help smokers kick the habit?
NCT ID NCT05797155
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a mobile app called Support2Quit that uses a psychological technique called cognitive dissonance to help people stop smoking. The study enrolled 437 adult smokers who wanted to quit. Researchers measured how many people stopped smoking and how much they reduced their cigarette use.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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437 people
The number who actually took part.
- Started
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Dec 2023
- Finished
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Mar 2025
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age 18 or older * Self-reported daily smoking * Having a valid home mailing address in the United States * English-speaking * Access to a smart phone with video capability for the duration of the project * Expressed desire to quit smoking Exclusion criteria: • Currently participating in a tobacco cessation program
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Oregon Research Behavioral Intervention Strategies, Inc.
Springfield, Oregon, 97477-2019, United States
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Other studies related to the condition(s) this trial covers.
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