Exchange Rates is perfect for you if you are tired of launching the OS X Calculator app and stepping through menu paths, or launching the fullscreen OS X Dashboard just for doing a simple currency conversion. It's a small currency calculator residing in the OS X status bar -- always available and always up-to-date. Nothing more, nothing less. Everything can be done using keyboard shortcuts, so you can easily convert an amount between two currencies without interrupting your current workflow by using the mouse or even launching another window-based application. All exchange rates are being updated continuously in the background, so you don't have to do anything about it. In addition, the fixed exchange rates of all euro predecessor currencies (such as the Austrian shilling or Deutschmark) and the cryptocurrencies Bitcoin and Litecoin are available as well. And just in case you would like to know what your paper currency is worth in sound money: Exchange Rates also offers precious metals (gold, silver, platinum and palladium) for conversions - each in grams and troy ounces.
The demo version has the following limitations: