With this app you can track number of cigarettes that you smoked and money spent on them. You can also see statistics for day, week and month, both in text and graph mode. You can share your achievements/failures with friends.

You can set up your goal - time between cigarettes, and both widget and application will change colors from red (you shouldn't smoke), through orange and yellow (you could smoke, but better wait a little bit longer), to green (it's OK now), to show you when you can smoke your next cigarette.