glass screen protector:
Now most smartphones have Gorilla Glass or some other screen. When you attach a plastic protector, you can observe the difference when you run your phone or smartphone; Particularly in terms of how evenly your finger slips. Tempered glass protectors touch more good the original screen.
Because of their density, glass screen protector will wart out a bit more than plastic. This is especially appreciable on devices like the iPhone 5 or the HTC One. The protector somewhat lifted from the smooth finish of the sides, which can be a creative issue for some. On the iPhone, this also means your Home button breaks up more than you used to. I know 0.5mm looks like a small number, but you can feel awesome.