I haven't used a screen protector on my devices for ages, I used to use them al of the time and I was obsessed with cases and screen protectors to keep my devices scratch free, But now I don't use them anymore because they are always annoying to put on and I find they bring up too many bubbles that you keep having to smooth out. With that being said I haven't used one for my iPhone and iPad, I only have cases for them and I haven't had any kind of scratches on my devices... touch wood I never do either.