Smokenot

Smokenot keeps a count of the days, the money and the cigarettes you did not
smoke, and puts a five minute breathing session next to you when a craving
shows up. It also keeps a short journal of cravings and slips, so you can see
your own pattern instead of guessing at it.

Everything is stored in one file inside your own home directory. The app
asks for no network, no account and no telemetry, and it works with the
machine offline.

The counters are a way to notice your own progress. They are not medical
advice and they are not a diagnosis of anything.