Theres free apps that do just this. Its a simple formula. What would make it stand out is if it would account for the price over time. A pack of smokes when I started was 2.99 and today is 10 bucks but the program only uses the 10 and says Ive saved well over 100k which is not nearly a close guess. If I keep using this app, in a year or two they will surely be 12 bucks and more... If they could add fields for price at start, price when quit and current price and a calculation that accounts for this though not exact would be a more useful reflection of my habit. You could argue inflation but Id argue that it should account for that too lol! Also a field for time spent. I cant see how they determine the time I spend smoking. I smoke regulars and my pal smokes kings. Hes always about 2 minutes longer during a smoke break. I would love to see a field I could set for this because this calculation could be considered close to real and Id really like to know. If the main focus of the app is day by day counting Id like to see it more customizable for this price. Otherwise theres free apps that do what this does and weve allready wasted enough money smoking...