Currency Exchange is a Pebble app build with CloudPebble.net to easily keep track on exchange. It uses yahoo finance API to get the actual currency set up.
The app allows to add, remove and set the preferred currency so the user can compare all the currency together;
Now that pebble app store is down you can download the pwb package directly.
Thankfully to geol.com/pebble you can also download many other apps.