Long ago I stopped smoking and somehow this app helped me a lot :

https://f-droid.org/packages/de.baumann.quitsmoking

What helped me was to monitor health (physical & mental health) I could gain back with continuing to stop smoking.

If any of you have this, even a web app I would love to try it, as I'm sure it would motivate me to see how better my body and mind gets to continue not drinking <3

Sorry I'm no english native speaker here