Sasler,

Great progress on this app. As I've probably mentioned before, it is not only very useful but very polished!

A couple of minor suggestions:
1. On the unit conversion screen, you should swap the positions of the "Currency" and "Next Unit" buttons in order to maintain consistency with the layout on the currency screen
2. Also on the main unit conversion screen, you should grey out the "Tip" and "Tax" buttons. I tried calculating a tip, but pressing the button did not work until I realized that I was on the Unit screen and not the Currency screen. Greying out those buttons on the Unit screen should eliminate confusion
3. You should update the help screens to reflect that you have many more currencies available now

Again, great job!