I haven't, but it looks cool. I don't do much with "quantified self" apps because I'm lazy, though. I'm just really bad at keeping track of counts for more than 5 minutes when I need to…
Like everyone!! It's because you can find that bad attitudes are more commons than others or we don't just take care enough. The best comment ever on this kind of appa was on AppStore : "It's perfect but if I've time to use it i definitely don't need it" :D