world exchange rate app for iPhone and iPad

When you travel or on business abroad, this app will help you very usefully.
1.It can show the currency rate off-line for every country.
2.It can be show the exchange rate and compare each other, also can calculate. When you are shopping, it can used as a calculator so that you can be a shrewd tourist.(click the right calculator will be based on the right countrys exchange rate.)
3.It can save the calculate result and the total amount.
4.It can get the currency on the city which you searching.
5.We have super cool interface

Tip:
You can click the left or right calculate for select A base currency for calculate.