AIM: To assess the efficacy of an intervention based on the specific design and implementation of a mobile application (APP) in order to reduce the prevalence of smoking consumption among young people motivated 18 to 30 years METHODS: Cluster randomised clinical trial. Unit of randomization: Primary Health Care Centers (PHCC). Intention to treat analysis. STUDY POPULATION: Motivated young smokers of 10 or more cigarettes per day aged 18 to 30 years consulting for any reason to PHCC and who provided written informed consent to participate in the trial.

INTERVENTION: 6-month implementation of recommendations of a Clinical Practice Guideline smoking cessation which includes mobile APPs application. Control group: usual care. OUTCOME MEASURES: Abstinence at 12 months confirmed by exhaled air carbon monoxide concentration of less or iqual 10 parts per million in each control.

RESULTS: The application of a smoking cessation intervention with a mobile APPs application will improve the smoking cessation success rate in smokers, besides of their intention or not to give up smoking at baseline.

Inclusion Criteria:

• Participant between 18 t0 30 years old smoking 10 or more cigarretes at day
• To have a smarthphone (Android, ios Ihpone, ios Ipad)
• Normal and high motivation for smocking cessation

Exclusion Criteria:

• To have other addictions
• Participants with Blackberry smarthphone