The application isn't developed by Facebook, It has it's own terms of service:

"c) You and your activities on the Service will not:

xiv) except as may be the result of standard search engine or Internet browser usage, use or launch, develop or distribute any automated system, including, without limitation, any spider, robot (or "bot"), cheat utility, scraper or offline reader that accesses the Service, or use or launch any unauthorized script or other software;"