Do you need to protect your smartphone and have some privacy The Nitro Glass Privacy Screen Protector for iPhone 6 6s iPhone 7 from zNitro is the new standard in screen protection. This isn’t your ordinary screen protector. It is made of Hammer Tested tempered glass that has been tested by an independent lab to withstand steel-ball drops from a meter high. Plus the privacy feature means no one on either side of you can see your screen.