So Which Screen Protector Is Best?
Don’t pay too much attention to the hardness rating that brands advertise—most use the ASTM hardness scale, in which the hardest pencil (9H) is softer than tempered glass, making it a useless indicator of protection. The Mohs scale—which does not use an “H”—is much more useful, though it doesn’t sound as good on the box. If you’re unsure about the hardness of a specific brand, Google around to see if anyone has tested it themselves with a Mohs kit.
In my opinion, most people are probably best off with a tempered glass protector: they have the smoothest feel, prevent the most damage, and are available at pretty decent prices. If you’re really finicky about looks, you may like PET or TPU better (since they aren’t as visible once applied to your phone), especially since films like TPU can provide self-healing edge-to-edge protection on phones with curved screens.
I’d avoid the liquid protection unless you know you aren’t going to use any of the others anyway, and want the warranty that Qmadix provides.
If You Want Impact Protection, Get a Case
That said, screen protection is just one piece of the puzzle. These films will help you avoid scratches and provide some impact protection, but if you’re worried about dropping your phone, don’t stop there—get a case.
A screen protector will not protect the back of your phone, the edges, or even the corners of the screen. A good case (especially one with a “lip” over the screen) will do more for drops than any screen protector, so unless you feel lucky—or have a good insurance plan—get a case along with whatever screen protection you decide on.