Connect with other travelers and exchange money in person. This app will match others who have currency that you need at the airport of your arrival or departure.

Avoid fees and poor exchange rates at the currency exchange places in the airport, avoid trips to the bank (plus banks are closed on the weekends!)
Instead, link with another traveler who got off the airplane from the country where you traveling to and who needs to get rid of left over cash in that currency. Chat and set up a meeting spot. Check current exchange rate on the app and agree to an exchange amount. Meet up with fellow traveler and exchange money at the airport. This keeps you safe. Rate your fellow. You got what you need and all set to go!