Pasadena-based Punchcard, the developer of mobile loyalty applications which is headed by Andy Steuer, said today that it has signed an agreement with KDA Group, a local marketing agency. Punchcard said the agreement authorizes the agency--one of the largest in the U.S.--to sell, manage, and promote Punchcard's products. Financial details of the agreement were not disclosed. KDA helps its clients drive local leads for their brands. Punchcard develops a mobile app which rewards consumers for return visits to their store. The firm is backed by Idealab.