Zagg's invisible shield. Not the HD version, that dents too easily.
Don't care if you have gorilla glass. Warranty covers replacements for life, all it costs you is $5 in shipping (or if you buy enough of the stuff to get into their rewards program like I have, replacements are 100% free).
I see people complain about the texture sometimes, but honestly, the spongy-ness of it will help protect against impact damage (dropping, etc). If you feel that the screen isn't slippery enough, rub your face on it. The material absorbs your body oils and will remain frictionless until something pulls it out (fine sand or dust or grit). Not a lot of people realize this, and when I tell them this, people are usually a little disgusted... but grow up. You can't use a phone and not have some of the oil on your face rub off on it. The only difference is your rubbing it in the shield (which is semi permeable) rather than off.
Amazing stuff, I swear by it. I prefer its texture to glass. And the back portion won't generally come in contact with your oils so it will have a higher friction, which allows you to put your phone down on any surface and you don't have to worry about it sliding off. Get the full body protection, but not maximum coverage, the small bits usually don't stay on very long. It might not last as long as other products, but that's what the replacement warranty is for, and it's worth it. I usually end up replacing mine every 6 months or so- usually something gets under a corner and over time more and more crap will get into that crevice, causing it to slowly lose its adhesiveness further and further up.
When applying it, don't worry if you can't get all the air bubbles out- as I said, it's semi permeable and the gas will evaporate out eventually.
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