Kick-Nic! Youth Quit Vaping App

High school and middle school students who want to quit vaping will be randomized to receive the Kick-Nic! app or a control NCI website to determine the efficacy of the app for vaping cessation. Participants will be screened for eligibility, then go through an 8 week treatment period where they will be given access to use the Kick-Nic! app or referred to the NCI Quit Vaping website. This will be followed by 1.5, 3, 4.5 and then 6 month follow up visits. Qualitative interviews with participants and school staff will also be conducted to obtain feedback on the app and best ways to implement/disseminate the app. Abstinence rates will be assessed biweekly during treatment including at end of treatment (EOT), and then at 1.5, 3, 4.5 and then 6 months follow ups (FU). Biochemical verification (salivary cotinine \< 30 ng.ml) of self-reports of abstinence will be conducted at EOT and 6-month FU.

Inclusion Criteria: 1. high school or middle school aged youth (12-19 years old), 2. regular current (past month) e-cig users using nicotine-containing e-cigs at least 1 day/week. 3. want to quit using e-cigarettes. 4. have a smartphone with data/WIFI plan in order to access and utilize the KickNic! app Exclusion Criteria: * Those who have non-stable (\