Just to qualify my review, I have owned every iPhone since the beginning and never cracked a screen. Some, I have installed screen protectors on and others I have left exposed. Recently, I started using tempered glass protectors just for the added layer of protection and used one protector for an entire year with no issues. When I purchased a new phone, I bought a package of these protectors and although I have not dropped the phone ever, I have noticed cracks on the tempered glass when I pick up the phone after it was laying face down on the table or if it bumped into something that would never crack the actual screen glass. In short, I have blown through the entire package of these screen protectors in a few months, in fact, 2 of them broke within a week and a half. Since I have definitely not changed the way I treat my phone, I can only say that these are brittle and very low quality. I would advise against purchasing these. I will definitely not be purchasing them in the future.