ExSmoke is a free iPhone application designed to assist users in quitting smoking, vaping, or any form of tobacco use. The app features three distinct modes: Tracker, Reduce, and Quit. In Tracker mode, users log their daily cigarette consumption while setting a limit and receiving recommendations for when to smoke. Reduce mode supports users in gradually decreasing their smoking intake until they reach their quit date. Quit mode helps users track the number of cigarettes avoided, money saved, and improvements in various health markers.

The app integrates with Apple Health to provide detailed insights into how smoking affects critical biological markers such as blood oxygen levels and heart rate. Additionally, ExSmoke includes a monthly calendar view for monitoring progress, iOS widgets for easy access to tracking, and customizable themes to personalize the user experience. With push notifications and various tracking tools, ExSmoke aims to make the journey to a smoke-free life more manageable and motivating.