App does not work with a physically connected printer! This application does not support HP Photosmart C4400 Series. My printer and scanner HP Photosmart C4480 both has a functioning printer and scanner when connected through USB to my desktop computer. However with this app, it does not even detect the existence of my device. I do not need nor want to purchase a WI-FI or Ethernet connectable device, I just want the device that I paid for to do its job properly withouth so much hassle. Go figure