It uses Seats.aero under the hood, which is a Roame competitor, but I’d love to integrate it with others. Seats.aero is the only one with an API, though, which I believe is a mistake on Roame and others’ part.
The actual searching for actively available award flights is the part this relies on Seats.aero for
The actual searching for actively available award flights is the part this relies on Seats.aero for