The goal of this randomized controlled trial is to assess the efficacy of the novel COach2Quit smartphone application by determining whether the use of this app reduces smoking more than brief anti-smoking advice alone. This will be a two-arm individually randomized trial and participants who are currently smoking will be assigned 1:1 to either study arm. Smoking behavior will be measured through self-report at baseline, 2-week and 1-month follow up visits. Smoking behavior will also be verified by 2 biomarker measurements: carbon monoxide breath test and urine cotinine, collected at baseline, 2-week and 1-month follow-up visits. In addition, participants will receive weekly follow-up calls. The primary outcome will be smoking cessation at the 1-month follow-up visit.