NeedXchange

Avoid fees and poor exchange rates at the currency exchange places in the airport, avoid trips to the bank (plus banks are closed on a weekends!)
Instead, connect 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 on an exchange amount. Meet up with fellow traveler and exchange the cash at the airport. This keeps you safe. Rate your fellow. You got what you need and all set to go!