Critiques of Your Android App Idea

I have an idea for an app and I thought others might to. Basically give a short demo/presentation of your app and then open it up to the floor for feedback with these questions in mind: Do you think others would use this app? What do you think about the UI design? Should I charge for it or how else can I make money with it (if this is a goal)? What do you like about it? What do you dislike about it? What about the features, too many, too little, what am I missing?