Add a "Quit smoking" timer.

If possible, it would be cool to have somewhere in the app a timer that counts the days:hours:minutes since you last smoked a cigarette.

Nothing fancy. A field where you can input the date and time when you smoked the last cigarette and decided to quit.
Maybe another field where you can input the number of cigarettes you used to smoke per day. That number could be used to show some statistics (total number of avoided cigarettes and maybe some light math to calculate the average number of days that were “won back” since you kicked the habit).

Thank you!