I really love the idea and can't wait to try it out, but I can't help but think it would be better suited for a free version. Even $1 is sometimes too high a barrier of entry for any kind of lifestyle improvement app.
Sorry but $1 Is not a barrier. People who think this has value will purchase it and the ones don't, won't.
I understand where you're coming from, but to deny that its a barrier would be to deny a fact. Charging vs not charging is a barrier of entry independent from the amount.
Love this concept - gamifying the time out. Something I've been trying to do more of lately.
This is very clever. Well done!
worth noting, this is not mine. I think its well done as well though.