Today Currency is an exchange rate check app, which can help you know about the current exchange rate each day in time.
1 update all current data in time
2 provide various currencies in currency drop-down list, such as CNY-USD, CNY-JPY, CNY-KNW,etc.
3 add at most 6 special currencies to top of the list
4 check the top currency in backwards and full-screen ways
5 customize currency and prompt user by notification
6 check and follow all reminded currencies in settings
7 sync data by Facebook