Great little app, lots of potential for improvements.... I've had graphics done a couple of times for it, including the currency in the drawer. Lots of ideas to improve--but also a steady seller. I've also considered making a "free" version with one register that lets you in-app purchase up to additional registers. This app is close to my heart (my daughter helped me develop it) -- and it is a good solid earner with great potential.
I have just recently released a corresponding 99 cent android version that just has basic cash register functionality now, no money or in-apps yet.