This app was mentioned in 7 comments, with an average of 1.29 upvotes
I used https://play.google.com/store/apps/details?id=com.motivebite.smokefree.free to wean myself off the smoking and then https://play.google.com/store/apps/details?id=com.EAGINsoftware.dejaloYa to keep track once I'd quit. Worked for me.
Found exactly what you're looking for I think? This app has both a quit mode and a reduce mode: https://play.google.com/store/apps/details?id=com.motivebite.smokefree.free
https://play.google.com/store/apps/details?id=com.motivebite.smokefree.free
Quit smoking slowly SmokeFree
Check out an app called smoke-free. https://play.google.com/store/apps/details?id=com.motivebite.smokefree.free
It helps you cut down. Then you can switch.
I quit using Chantix with the help of this app 3 months ago, it helps a lot managing the habit and puts you on track.
https://play.google.com/store/apps/details?id=com.motivebite.smokefree.free
This is what I used to stop smoking. Works amazing.