Remote Management Capabilities/Range Extender Management

RAX 40 connected to EX7000 Range extender. Two questions! Wondering what sort of remote management capabilities are available outside of the nighthawk app. The EX7000 also claimed to be compatible with the nighthawk app but when pairing/setting up it took me to mywifiext.com instead. In any case, I would also like to be able to see what home devices are connecting to each network device. Due to the compatibility issue I would imagine that the Nighthawk app cannot tell which device is connected to which signal, it simply states, "this device is connected to RAX40 via Wifi". I have not been able to find anything analytical in the windows suite outside of netgear genie, which is limited. Is there any other medium I can use, that isn't part of the paid business analytical service(s), to look at various device connections?