Secure password manager that's also nice to use

Keyguard on a Wear OS watch
Keyguard on an Android phone
Keyguard on an Android tablet
Keyguard on macOS
Keyguard on Windows
Keyguard on Linux

Keyguard is a third-party client for the Bitwarden platform and KeePass (KDBX) files. It autofills your logins, supports passkeys, works offline, and runs a Watchtower that finds leaked and reused passwords and other issues.