The radar icon in the Vision Plus App works fine and indicates correctly the direction that the Phantom is facing when using iphone4. This is not true, however, when using the Kindle Fire HDX tablet as the direction if off by at least 90 degrees. Doesn't make any difference whether the table is held in landscape or portrait orientation. Anyone run into this problem? Thanks. Edit: I see now that this compass problem occurs when using any compass app in the Kindle. I will get with the Kindle folks and see what they can tell me. Edit: On the other hand, the App wouldn't be using the tablet's compass but rather the signal from the Phantom. Meanwhile, feel free to break into this self conversation.