USD to euro Converter / US dollar to Euro is a very useful app to convert between the eponymous currencies.
This is a very easy-to-use app. This is due to the fact that you just have to enter the amount to be converted to the other currency, whether you want to convert euros to dollars or vice-versa.
If you're one of those people who travel a lot and have to do currency exchange often USD to euro Converter / US dollar to Euro should prove very useful.