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Hello Yoonseop, Without knowing what specific tools you are using to develop with, the best guide to how to tell what device you are running your app on is at our feature specifications page at : https://developer.amazon.com/public/solutions/devices/fire-tv/docs/device-and-platform-specifications . That page will contain the strings we use to help identify Amazon FireTV to developers. android.os.Build.MANUFACTURER "Amazon" android.os.Build.MODEL "AFTB" So, if you look for the specific os.build.MODEL string in your app, you can place controller support or any other logic you wish to implement specifically to FireTV.

Thanks. I'm going to back to work with a happy feeling. :)