There aren't any programs that do the same thing without rooting. Android doesn't have any APIs that allow you to change the color temperature, so all of the no

There aren't any programs that do the same thing without rooting. Android doesn't have any APIs that allow you to change the color temperature, so all of the non-root apps just add a transparent red overlay on top of the screen. I know this area well since it's one thing I was really looking forward to when I got an Android phone and I was very disappointed.