[ruanmed]

I use KeePass kdbx file synced in my Linux computer and Android smartphone through Google Drive. For that I use Keepass2Android in my phone.

I just searched and there are also iOS applications that also provide easy cloud sync, one of such is KeePassium[1].

[1] https://keepassium.com/

[Mirioron]

I'd like to add that if you end up syncing the password database through a service like Google Drive then you should use a password and keyfile on the password database. Share the keyfile in a (more) secure way with your device and don't put it anywhere like Google Drive etc. This way even if somebody captures your password database and somehow gets your password they still can't open the password database because it requires the keyfile.