Sobriety Tracker aims to help you quit any addiction by counting the time since they were last participated in, as well as set goals for you to reach. The app can optionally tell you how much money and/or time has been saved since quitting.

There is PIN protection, so someone can't just open the app without your permission.

This app is open source, view at: https://github.com/itsmaxymoo/SobrietyTracker