I really really like it. I see the value and have signed up and added to my homescreen. Truly a great interface compared to typing out numbers.

Also I really want to turn this into an iOS app! There's some cool stuff you can do with it natively, like add a buzz + sound when you save a buck, which sure would feel satisfying (ever used the task management app Clear?). Let me know if you wanna go that way and I'd be happy to put a weekend towards it.