Quit Smocking is a free open-source Android application that helps smokers quit the bad habit.
It includes a built-in logger that allows the user to record, track and analyze his smocking habit, while trying to quit.
It includes statistics about when stopped smoking, days not smoked and saved cigarettes, money and time.
The app also includes notification about the progress of benefits when you quit smoking (breathing, cancer, …).
The app also features a diary that allows the user to log whatever he wants and backup it later on an external SDcard.
The app and the source code is released under the GPL 3.0 License which is is a free, copyleft license for software and other kinds of works.