Finally getting to password manager

I've used Bitdefender for a few years now and want to move everything to the manager. I have passwords saved in Google mgr, Firefox mgr and some on my iPhone.

What is the best way to consolidate them?

Is there any part of Bitdefender password mgr that will check and verify that passwords are working? I notice there have been multiple passwords saved for the same website. Ugh.

Any suggestions? Also, what do you recommend using on my iPhone for passwords?