The Petal 1 Card exchange rate is Visa's exchange rate on the date you make an international purchase. Visa exchange rates change on a daily basis, but they do not make their exchange rate public. The rates do tend to be quite low, however.
While credit card exchange rates normally also include foreign transaction fees, the Petal 1 Card does not charge foreign fees. This means the Petal 1 Card will save cardholders 1.54% on purchases with international merchants, compared to the average credit...