A more managed interface
I would like to see my previous days expenses to be compressed (per day basis), which i can expand and see when i'm in need. Also, in compress form, just beside it, show what was the total spending on that day it). Also in lower left show some stats, like avg per day spending (do not include earning in it). You can be bit more innovative if you can suggest based on monthly earning, the avg daily earning should not exceed an optimal value that should be determined by an optimal algorithm. There are plenty of way to enhance this interface.