You can login into the Knog app on multiple iOS devices using your personal login details. You will be able to view all the Knog Scout devices that are linked to your profile. However, any secondary device will only have READ ONLY access.
It is ONLY possible to control the Knog Scouts from the original device in which it has a bonded/encrypted connection. Removing the Scouts from the secondary device will not affect the primary Scouts bonded to the primary device.