I've quit for 1 day 23 hours, but the "coach" in the app just told me: "Well done Jen, you've been smoke-free for 4 days. Be proud, and tell yourself: I don't need cigarettes!" That's nice and all, but the coach can't do math, apparently.
Also, it's minor, but the amount saved uses a comma instead of a period to separate dollars and cents. So my saved amount looks like: 12, 80$. That's annoying.
I really love the interface to this app. I think if the bugs were fixed and some important features added, it's one of the best quit smoking apps I've seen so far. It's simple & clean. Looks professional, not cluttered and junky, like other quit smoking apps.
No in-app social feature or journal.
There is an achievements page that shows you when your body rids itself of all nicotine, etc. That page is super fun and I would like more to that feature. I play a lot of iOS games and it almost feels like that! If this was expanded somehow, it would be like quitting smoking is an addictive game!