Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
Not an iOS user and it certainly seems like something they would be behind on, but with Android every password manager with a Android app will work since the hooks are built directly into Android. Other than websites and apps that don't implement passwords properly it works pretty well.