I developed an iPhone app called Wallet Dilemma that helps you compare your credit cards for foreign transactions.

It pulls the exchange rates directly from Visa, MasterCard and American Express and has a database with 100+ cards from 40+banks in the US!

No more hidden fees, no more guessing, know exactly how much will be debited from your account!

You can check out Wallet Dilemma in the App Store : http://bit.ly/WDilemma