Whitestone Dome Glass UV Kit
Perhaps the best tempered glass screen protector for any phone is the Whitestone Dome Glass. They became extremely popular in 2018 for offering a truly new and unique way to install and apply screen protectors to phones, especially ones with a curved display.
Most curved screens don't play very nicely with screen protectors. The curve doesn't match the phone, and you get dead spots while trying to type or tap on the screen. Or, the protector will raise up, peel off, and get ruined They solved that problem 100%.
Whitestone gives you an easy installation tray, a liquid to install the screen protector and a UV light that actually "cures" the screen protector in place. This ensures a perfect fit with no touchscreen issues. These protectors are extremely popular because they work great, and they're easy to install.
And thankfully, they finally offer them for the Pixel 3 and Pixel 3 XL. It's a little more expensive, but trust us, it's worth it.