When registering the device, select Camera (ONVIF) as the Device Type.

For details, please refer to the Operating Instructions at the following URL.
https://i-pro.com/products_and_solutions/en/surveillance/i-pro-mobile-app

Depending on which version or function of ONVIF the camera supports, i-PRO Mobile APP may not connect to the cameras or not work correctly. And some functions may work slowly.