While it's an interesting idea (and I know the pain!) the problem is that you are out for a smoke for max 10 minutes. So there should be quite a lot of active u

While it's an interesting idea (and I know the pain!) the problem is that you are out for a smoke for max 10 minutes. So there should be quite a lot of active users from the start, otherwise you check once, twice, no one is out there, forget it. Unless some people try to make some money of it using this app, by selling extremely overpriced cigarettes.