It's strange how I never see this mentioned anywhere, but there's a way to get unique secure passwords for every site/app without needing to store them anywhere. It's called LessPass, and essentially generates passwords based on 3 fields (site, username, master password) and works relatively well, because the advantages are quite obvious I'll list the potential downsides:

• If one password is compromised or needs changing for whatever reason you need to increase a counter and need to remember which counter for which site (this is less problematic than it sounds, except in places that have a password policy that forces you to change your password periodically)
• Android can store the master password and use fingerprint to input it, but in PC you always have to type your master password which can get annoying.
• You need to change your passwords to this new format, which can take a while, and years down the line you're trying to login somewhere and don't remember if you've already migrated it or not.