Incipio Plex Plus Shield ($50)
Last but not least, for now, is the Plex Plus shield from Incipio. Another popular brand that makes great cases and you've probably seen in Verizon, Best Buy, and other retail shops.
Incipio is offering a thin, durable, curved tempered glass screen protector for the Galaxy S9. They're using the industry standard 9H hardness glass, but then they make it even better.
Each Plex Plus Shield has an anti-scratch coating, anti-fingerprint coating, curved and rounded edges, 99.9% clarity and a static-free finish. Basically, it's strong and works great without getting in the way. They make each screen protector a few mm short too, that way it works with a case installed at the same time.
These are the best screen protectors worth buying. Good luck.