Ive been running this app for a couple years now on every iPhone and iPad Ive had. It connects to our CCTV security camera system without any issues and we are able to access it on our phones from anywhere we have cellular service. The bad part which is hopefully fixed soon is that on my iPhone 6 plus, the camera picture feed no longer fills the entire frame. For example, if my view is set to see 4 cameras at once. The picture doesnt fill its square that each camera feed is given, leaving space on the top and right margin. My guess is because of the larger resolution of the 6 plus that the app isnt exactly updated for. It works fine on my wifes regular iPhone 6. I cant comment on the PTZ functions as I dont have a PTZ camera and I also do not use the apps notifications. We use it purely as a viewer while away from home.