EmptyLegMarket has launched a new iPhone app with a name-your-price bidding feature for charter flights. The app allows users to enter the desired trip, the amount of the bid and payment information. Participating charter operators can elect whether or not to accept the bid. “The goal is to use empty legs or transient airplanes that are just sitting,” said EmptyLegMarket founder Elliott Schwartz. “It simplifies the chartering process so you can understand what the customer is willing to pay.”