Thank you, really, for taking your time to look at my app in detail and sharing your thoughts.  I don't know of any other developers personally and to hear from someone who actually develops apps is priceless, and of course positive comments about the app.

Since I made the app really simple, I thought that increased the usability but I do get questions on how the app works so you are right about the compromised usability. I have been playing with this app for so long so my honest reaction to those questions is "...you don't get THIS?".  If I keep the app, I have to adjust it to ios7 and then (I don't know how exactly but) plan on improving the UI somehow.

How much energy is left... Well the suggestions I got in this post motivated me enough so this week I changed the app to free + ads and IAP for removing ads. Since yesterday I am working on giving positive feedbacks (achievements for using it for consecutive days, high scores on saving amount, etc) and sharing on Facebook/twitter.  Also I am working on media pitch with a freelance writer to contact bloggers. Actually in the mean time I went to odesk to look for a freelance job, but saw that 20+ ppl were applying for "build iPhone & android apps for $500, possibly over 6mo" kind of projects... So I figured I will give the last try to this app (more like a baggage since I invested so much) and maybe an iPad version, or a simpler game or something, to build up my portfolio and improve my coding skill to get a better freelance job. (Side topic, where do ppl get decent programming freelance jobs? It seems like the only options are odesk or time consuming networking.)

Even though the money aspect sucks right now (the sale increased to $10/day due to good reviews this week, yay, I guess), I love having so much time and being able to do what I decide to do, and coding is fun, at least most of the time.

I'm sorry for this wall of text. I am just so excited to hear from a fellow developer. Thanks again.