My daughter got a hold of a fine tipped metal object and ran it across my phone screen. The top of my screen protector was badly damaged but the screen underneath was in pristine condition. I have seen lots of phones that are several years old, virtually all of them have some form of screen damage. I have yet to see a phone over two years old, had no screen protector throughout its life, and its screen remained in new condition. I had my iPhone for over two years though and its screen is still in new condition. Perhaps some people can do it, but I would much rather spend $5 on a screen protector and not have to worry about it, because for me, life happens. FYI, Gorilla glass is not scratch proof.