The R-7 is available in 2 different camera orientation configurations - one portrait orientation, one landscape. We provide the portrait orientation primarily to make tracking objects being held in the user's hands easier; The field of view extends much lower. The landscape orientation is more classic, for taking photos, etc.
Your App can use Android Model number to determine camera orientation and display resolution. Here are the Model Numbers:
R7-P - 720p/30 degrees FOV, camera sensor is mounted portrait.\
R7-W - 720p/30 degrees FOV, Camera sensor is mounted landscape
Check Build.MODEL via this API: https://developer.android.com/reference/android/os/Build.html