It’s the paid version. They give you 7 free days of the paid version so you can get a feel for all of the features. I like it so far. 1Password is probably a little “better” because it’s more polished and there’s a few things it has that Proton doesn’t, like a desktop app. But as far as day to day goes they’re pretty similar, and Proton’s running a launch special where you can get two years of the paid version for $24. That’s kind of hard to be since 1Password is $35 a year

Memmy is another good option if you’re on iOS.

I’d say they’re pretty much necessary so you can have unique, complex passwords.

I’m currently test driving Proton’s new password manager, I’ve been using 1Password for ages.