I cannot say enough About this app. This app was done by pros. I am a grad student and work online, and hence i spend a minimum of 12 hours looking at a screen. NightEye hands down is the best purchase i ever made as far as extensions go. Saved me from headaches from eye fatigue.
I have tried others and by far must say this is not one of those apps that just change the color of the screen or dim the screen. There is some algorithms at work here. I am a grad student in computer science and they have my respect.