2025-02-07 00:00:00 Welcome to the SiS app! This smoking cessation app is designed for people who smoke less than daily. “SiS” stands for “Smiling instead of Smoking” - the app uses a positive psychology approach to support you in quitting smoking. Smoking is dangerous for everyone, even for people who smoke less than daily. Smoking as few as 6-10 cigarettes per month can substantially impact your health. The app was designed by scientists based on existing evidence and clinical guidelines regarding smoking cessation [https://cancer.gov/publications/patient-education/clearing-the-air]. The research informing this app was funded by the American Cancer Society and the National Cancer Institute. Each day, the app gives you specific tasks. These tasks introduce you to the app’s tools. Each task is timed specifically with regards to your chosen quit day, so that each day the app gives you the task most relevant to you that day. For best results, we recommend using the app every day for 7 weeks: for the 1 week leading up to your chosen quit day (prep work is important!), and the 6 weeks following your quit day.