Currencies is a simple yet gorgeous currency converter that lets you quickly and easily find out how much that sandwich at Heathrow airport will really cost you in good old US greenbacks. (Hint: not cheap!)

Developer Luc Vandal shared his favorite feature with us, and we have to admit it's ours as well:

there are no useless buttons. Just tap on a field, select currency or enter amount and everything gets updated on the fly. No Done button, no OK button, etc. Want to make sure you have the latest rates? Just shake to refresh and amounts are updated almost instantly.

He's right; it works as good as it looks. Which brings us to the UI design, done by Cocoai's Sebastiaan de With. His growing reputation is well deserved. Small but delightful little touches like the exposed electronics when rearranging the currency fields is especially artistic and appreciated (see above).

Who would have thought conversion apps would be leading the quality charge on the App Store?

Currencies is available via iTunes for $0.99

If you've tried it, let us know what you think. More screenshots after the break...

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