It is very intuitive and extremely user friendly. It works even when there are no networks available, just the latest updated rates will be shown.
Add currency pairs (yes, we hate it too when all currency applications are showing the rates against the USD only). When adding choose what period of time you want to track, the application will show the change in the rate as well as the latest rate. Select to receive notification, when the change is greater than an specified percent. The help pages inside the application explains the whole process easy and intuitively.
Currently supporting more than 50 currencies. Currencies can be added on the fly without needing to upgrade the app, just tell us what else you need!
Finally follow us in Facebook and Twitter to get the latest news and updates. Search for iCurrency Plus! The application can be downloaded at http://itunes.apple.com/us/app/icurrency-plus/id349442283?mt=8