Hi guys, here's my situation. I've had Logitech Alert cameras that have been pretty good to me. I like that I can watch everything while on my desktop, and that it'll record overnight onto the memory card when my desktop is off and there's motion where I define. But, they're unreliable and it's time for me to move on. I don't want to leave my computer on all the time, so I assume my best option is to get an NVR? Ultimately I'll probably have 4 POE cameras. Do you have a recommendation for me for a good NVR? I assume whatever NVR I buy will have some kind of mobile app I can use? And, desktop software? I guess I don't understand whether I'd need Blue Iris or not. Thank you!