Will a tempered glass screen protector prevent screen from cracking?

What does a tempered glass screen protector do really? Their being sold on ebay and I need something that will help preventing my iphone 5s from cracking besides a case.

Tempered glasses r just good enoughto protect from force of finger or stylus. Having a good case for iphone is nessesary

  • Tempered glass screen protector? I just received a tempered glass screen protector for my iPhone 5s. I was just wondering, since this screen protector is so durable, do you still feel the need to buy a really protective case for your phone? I was thinking of just buying a case that snaps on in the back and only protects the two sides of your phone. Also, if you have a tempered screen protector on your phone, what case do you use?
  • Tempered glass screen protector for iphone 5s? I'm thinking about buying a tempered glass screen protector for my new iphone 5s. I was just wondering, if i will still be able to effectively use the fingerprint function? I see lots of people adding on a home button sticker. I'm guessing it's because the screen protector makes it harder to press the home button. Can someone please help me out?
  • Tempered Glass screen protector a good idea? I have an iPhone 5s and right now I have just a regular screen protector on it. I see some people are getting the tempered glass screen protectors on their iPhones. Are they worth it? Please give me information and your opinion.
  • Should I get a new tempered glass screen protector? My parents bought me a new phone (iPhone 6s) after my old one got waterdamaged and they bought a tempered glass screen protector with it. In school, it fell off of my desk face down onto the carpet. It cracked a little bit but I don't think the phone's actual screen cracked with it. Should I get a new one or just keep it?